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प्र: A flagstaff 17.5 m high casts a shadow of length 40.25 m. What will be the height of a building, which casts a shadow of length 28.75 m under similar conditions ? 1697 1

उत्तर : 3. "12.5 cm"
व्याख्या :
Answer: C) 12.5 cm Explanation: Let the required height of the building be x meter More shadow length, More height(direct proportion) Hence we can write as (shadow length) 40.25 : 28.75 :: 17.5 : x⇒ 40.25 × x = 28.75 × 17.5⇒ x = 28.75 × 17.5/40.25= 2875 × 175/40250= 2875 × 7/1610= 2875/230= 575/46= 12.5 cm

प्र: A student multiplied a number by 2/5 instead of 5/2. What is the percentage error in evaluation ? 1695 0

उत्तर : 3. "84%"
व्याख्या :
Answer: C) 84% Explanation: Let the number be 'x' Then, according to the given data, 52x-25x52xx100 = 2125x100 = 84%

प्र: At what time, in minutes, between 3 o'clock and 4 o'clock, both the needles will coincide each other? A. 5111 B. 15415 C. 16411 D. 4415 1694 0

उत्तर : 3. "Option C"
व्याख्या :
Answer: C) Option C Explanation: At 3 o'clock, the minute hand is 15 min. spaces apart from the hour hand. To be coincident, it must gain 15 min. spaces. 55 min. are gained in 60 min. Then 15 min spaces are gained in = 6055×15 min. Therefore, The hands are coincident at 16411 min. past 3 o'clock.

प्र:
त्रिभुज का क्षेत्रफल वर्ग का आधा है। वर्ग की परिधि 224 सेमी है। त्रिभुज का क्षेत्रफल क्या है?
1694 0

उत्तर : 5. "इनमें से कोई नहीं"
व्याख्या :
given 4a=224,
a=56, so that Area of square is=a²=56*56
so that Area of Triangle is a²/2=1568

प्र: Square units 13 by 9 of an office area is 1693 0

उत्तर : 2. "117"
व्याख्या :
Answer: B) 117 Explanation: Square units 13 by 9 of an office means office of length 13 units and breadth 9 units. Now its area is 13x 9 = 117 square units or units square.

प्र: Swetha when get married to Sudeer her age was 3/4 th of her husband's age. After 12 years her age became 5/6 th of her husband's age. Then what's the age of Swetha when she got married ? 1693 0

उत्तर : 1. "18 years"
व्याख्या :
Answer: A) 18 years Explanation: At the time of marriage, let Sudeer's age be 4x, then Swetha's age is 3x12 years after:Age of Sudeer = 4x+12Age of Swetha = 3x+12Now the equation is 3x+12=5/6(4x+12)Solving equation we get x=6Hence Swetha got married at the age of 18.

प्र: A can do a piece of work in 30 days. He works at it for 6 days and then B finishes it in 18 days. In what time can A and B together it ? 1693 0

उत्तर : 4. "12 6/7 days"
व्याख्या :
Answer: D) 12 6/7 days Explanation: Let 'B' alone can do the work in 'x' days 6/30 + 18/x = 1 => x = 22.5 1/30 + 1/22.5 = 7/90 => 90/7 = 12 6/7 days

प्र: The profit earned by selling an article for Rs.753 is equal to the loss incurred when the same article is sold for Rs.455.What should be the sale price for making 50% profit ? 1692 0

उत्तर : 3. "Rs.906"
व्याख्या :
Answer: C) Rs.906 Explanation: Let C.P =Rs. x Then as given, (753 - x ) = (x - 455) =>2x = 1208 => x = 604 There fore S.P= 150% of 604 => Rs. 150100×604= Rs.906

प्र: A flagstaff 17.5 m high casts a shadow of length 40.25 m. What will be the height of a building, which casts a shadow of length 28.75 m under similar conditions ? 1697 1

प्र: A student multiplied a number by 2/5 instead of 5/2. What is the percentage error in evaluation ? 1695 0

उत्तर : 3. "84%"
व्याख्या :
Answer: C) 84% Explanation: Let the number be 'x' Then, according to the given data, 52x-25x52xx100 = 2125x100 = 84%

प्र: At what time, in minutes, between 3 o'clock and 4 o'clock, both the needles will coincide each other? A. 5111 B. 15415 C. 16411 D. 4415 1694 0

प्र:
त्रिभुज का क्षेत्रफल वर्ग का आधा है। वर्ग की परिधि 224 सेमी है। त्रिभुज का क्षेत्रफल क्या है?
1694 0

उत्तर : 5. "इनमें से कोई नहीं"
व्याख्या :
given 4a=224,
a=56, so that Area of square is=a²=56*56
so that Area of Triangle is a²/2=1568

प्र: Square units 13 by 9 of an office area is 1693 0

उत्तर : 2. "117"
व्याख्या :
Answer: B) 117 Explanation: Square units 13 by 9 of an office means office of length 13 units and breadth 9 units. Now its area is 13x 9 = 117 square units or units square.

प्र: Swetha when get married to Sudeer her age was 3/4 th of her husband's age. After 12 years her age became 5/6 th of her husband's age. Then what's the age of Swetha when she got married ? 1693 0

प्र: A can do a piece of work in 30 days. He works at it for 6 days and then B finishes it in 18 days. In what time can A and B together it ? 1693 0

उत्तर : 4. "12 6/7 days"
व्याख्या :
Answer: D) 12 6/7 days Explanation: Let 'B' alone can do the work in 'x' days 6/30 + 18/x = 1 => x = 22.5 1/30 + 1/22.5 = 7/90 => 90/7 = 12 6/7 days

प्र: The profit earned by selling an article for Rs.753 is equal to the loss incurred when the same article is sold for Rs.455.What should be the sale price for making 50% profit ? 1692 0

उत्तर : 3. "Rs.906"
व्याख्या :
Answer: C) Rs.906 Explanation: Let C.P =Rs. x Then as given, (753 - x ) = (x - 455) =>2x = 1208 => x = 604 There fore S.P= 150% of 604 => Rs. 150100×604= Rs.906

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प्र: A flagstaff 17.5 m high casts a shadow of length 40.25 m. What will be the height of a building, which casts a shadow of length 28.75 m under similar conditions ? 1697 15b5cc6f4e4d2b4197774f013

प्र: A student multiplied a number by 2/5 instead of 5/2. What is the percentage error in evaluation ? 1695 05b5cc6c0e4d2b4197774dae4

उत्तर : 3. "84%" व्याख्या :Answer: C) 84% Explanation: Let the number be 'x' Then, according to the given data, 52x-25x52xx100 = 2125x100 = 84%

प्र: At what time, in minutes, between 3 o'clock and 4 o'clock, both the needles will coincide each other? A. 5111 B. 15415 C. 16411 D. 4415 1694 05b5cc77ae4d2b41977750133

प्र: त्रिभुज का क्षेत्रफल वर्ग का आधा है। वर्ग की परिधि 224 सेमी है। त्रिभुज का क्षेत्रफल क्या है? 1694 05d4aa1bf11160f2052371576

उत्तर : 5. "इनमें से कोई नहीं" व्याख्या :given 4a=224,a=56, so that Area of square is=a2=56*56so that Area of Triangle is a2/2=1568

प्र: Square units 13 by 9 of an office area is 1693 05b5cc662e4d2b4197774be89

उत्तर : 2. "117" व्याख्या :Answer: B) 117 Explanation: Square units 13 by 9 of an office means office of length 13 units and breadth 9 units. Now its area is 13x 9 = 117 square units or units square.

प्र: Swetha when get married to Sudeer her age was 3/4 th of her husband's age. After 12 years her age became 5/6 th of her husband's age. Then what's the age of Swetha when she got married ? 1693 05b5cc71be4d2b4197774f55e

प्र: A can do a piece of work in 30 days. He works at it for 6 days and then B finishes it in 18 days. In what time can A and B together it ? 1693 05b5cc6d8e4d2b4197774e755

उत्तर : 4. "12 6/7 days" व्याख्या :Answer: D) 12 6/7 days Explanation: Let 'B' alone can do the work in 'x' days 6/30 + 18/x = 1 => x = 22.5 1/30 + 1/22.5 = 7/90 => 90/7 = 12 6/7 days

प्र: The profit earned by selling an article for Rs.753 is equal to the loss incurred when the same article is sold for Rs.455.What should be the sale price for making 50% profit ? 1692 05b5cc783e4d2b41977750205

उत्तर : 3. "Rs.906" व्याख्या :Answer: C) Rs.906 Explanation: Let C.P =Rs. x Then as given, (753 - x ) = (x - 455) =>2x = 1208 => x = 604 There fore S.P= 150% of 604 => Rs. 150100×604= Rs.906

त्रुटि की रिपोर्ट करें

त्रुटि की रिपोर्ट करें

त्रुटि की रिपोर्ट करें

त्रुटि की रिपोर्ट करें

त्रुटि की रिपोर्ट करें

त्रुटि की रिपोर्ट करें

त्रुटि की रिपोर्ट करें

त्रुटि की रिपोर्ट करें

प्र: A flagstaff 17.5 m high casts a shadow of length 40.25 m. What will be the height of a building, which casts a shadow of length 28.75 m under similar conditions ? 1697 1

प्र: A student multiplied a number by 2/5 instead of 5/2. What is the percentage error in evaluation ? 1695 0

उत्तर : 3. "84%"
व्याख्या :
Answer: C) 84% Explanation: Let the number be 'x' Then, according to the given data, 52x-25x52xx100 = 2125x100 = 84%

प्र: At what time, in minutes, between 3 o'clock and 4 o'clock, both the needles will coincide each other? A. 5111 B. 15415 C. 16411 D. 4415 1694 0

प्र:
त्रिभुज का क्षेत्रफल वर्ग का आधा है। वर्ग की परिधि 224 सेमी है। त्रिभुज का क्षेत्रफल क्या है?
1694 0

उत्तर : 5. "इनमें से कोई नहीं"
व्याख्या :
given 4a=224,
a=56, so that Area of square is=a²=56*56
so that Area of Triangle is a²/2=1568

प्र: Square units 13 by 9 of an office area is 1693 0

उत्तर : 2. "117"
व्याख्या :
Answer: B) 117 Explanation: Square units 13 by 9 of an office means office of length 13 units and breadth 9 units. Now its area is 13x 9 = 117 square units or units square.

प्र: Swetha when get married to Sudeer her age was 3/4 th of her husband's age. After 12 years her age became 5/6 th of her husband's age. Then what's the age of Swetha when she got married ? 1693 0

प्र: A can do a piece of work in 30 days. He works at it for 6 days and then B finishes it in 18 days. In what time can A and B together it ? 1693 0

उत्तर : 4. "12 6/7 days"
व्याख्या :
Answer: D) 12 6/7 days Explanation: Let 'B' alone can do the work in 'x' days 6/30 + 18/x = 1 => x = 22.5 1/30 + 1/22.5 = 7/90 => 90/7 = 12 6/7 days

प्र: The profit earned by selling an article for Rs.753 is equal to the loss incurred when the same article is sold for Rs.455.What should be the sale price for making 50% profit ? 1692 0

उत्तर : 3. "Rs.906"
व्याख्या :
Answer: C) Rs.906 Explanation: Let C.P =Rs. x Then as given, (753 - x ) = (x - 455) =>2x = 1208 => x = 604 There fore S.P= 150% of 604 => Rs. 150100×604= Rs.906