IIT JEE प्रश्न और उत्तर का अभ्यास करें

प्र: Find which of the two conclusions I and II given below is/are definitely true from the the given statements.   Statements: I > W > T > N, I = F = G = C   Conclusions:    I. W > I                                           II. C > N 1196 0

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    Only Conclusion I is true
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  • 2
    Only Conclusion II is true
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  • 3
    Both conclusions I & II are true
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  • 4
    Neither conclusion I nor II is true
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उत्तर : 2. "Only Conclusion II is true"
व्याख्या :

Answer: B) Only Conclusion II is true Explanation: From the given Statements :   1. I > W > T > N  2. F = G = C  Conclusions are :   I. W > I (False)  II. C > N (True)

प्र: Name the U.S. war between the north and the south? 1195 0

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    American Civil War
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  • 2
    Colonial wars
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  • 3
    War of Independence
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  • 4
    Post-Civil War
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उत्तर : 1. "American Civil War"
व्याख्या :

Answer: A) American Civil War Explanation: The American Civil War has been known by a number of names since it began in 1861.   In most East Asian languages, the war is called "Battle between North and South side of the United States" or more commonly as "American (U.S.) North–South War", depending on the individual language.

प्र: Two trains are running at 40 km/hr and 20 km/hr respectively in the same direction. Fast train completely passes a man sitting in the slower train in 5 seconds. What is the length of the fast train? 1195 0

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    27 7/9 mts
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  • 2
    25 8/7 mts
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  • 3
    21 1/4 mts
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  • 4
    22 mts
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उत्तर : 1. "27 7/9 mts"
व्याख्या :

Answer: A) 27 7/9 mts Explanation: Relative speed = (40 - 20) km/hr = 20 x 5 m/sec = 50 m/sec. 18 9  Length of faster train = 50 x 5 m = 250 m = 27 7 m. 9 9 9

प्र: 36 of what number is 18? 1193 0

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    38
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  • 2
    42
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  • 3
    50
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  • 4
    62
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उत्तर : 3. "50"
व्याख्या :

Answer: C) 50 Explanation: Let the required number be 'p' 36 of what number is 18 implies 36% of p = 18 => 36 x p/100 = 18 => p = 1800/36 => p = 50.   Hence, 36% of 50 is 18.

प्र: India has successfully test-fired the BrahMos supersonic cruise missile from Indian Air Force ___________ fighter aircraft for the first time. 1192 0

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    Sukhoi-29 MKI
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  • 2
    Sukhoi-32 MKI
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  • 3
    Sukhoi-31 MKI
    सही
    गलत
  • 4
    Sukhoi-30 MKI
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उत्तर : 4. "Sukhoi-30 MKI"
व्याख्या :

Answer: D) Sukhoi-30 MKI Explanation: Brahmos, the world’s fastest supersonic cruise missile created history on today after it was successfully flight- tested for the first time from the IAF’s frontline fighter aircraft Sukhoi-30MKI against a sea-based target in the Bay of Bengal. The armed forces are now capable of launching the Brahmos, which has a strike range of around 290 km and is described as the world’s fastest supersonic cruise missile, from land, sea and air, completing the tactical cruise missile triad for the country.

प्र: The 'IFSC Code' is an alphanumeric code comprising 11 characters that facilitates Electronic Fund Transfer in the country. The alphabet 'F' in the abbreviation 'IFSC' stands for ? 1191 0

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    Fund
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  • 2
    Fast
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  • 3
    Financial
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  • 4
    First
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उत्तर : 3. "Financial"
व्याख्या :

Answer: C) Financial Explanation: IFSC stands for - Indian Financial System Code. This is a code uniquely identifies each bank branch participating in the two main Payment and settlement systems in India : 1. RTGS - The Real Time Gross Settlement  (and) 2. NEFT - The National Electronic Fund Transfer (NEFT) systems.

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उत्तर :
व्याख्या :

From given data, (C.P. of 17 balls) - (S.P. of 17 balls) = (C.P. of 5 balls) C.P. of 12 balls = S.P. of 17 balls = Rs.720. Hence, C.P. of 1 ball = Rs.720/12 = Rs. 60.

प्र: Find the length of a train if it takes 10 seconds to cross a pole and double of this time to cross a platform of length 200 mts ? 1189 0

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    180 mts
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  • 2
    190 mts
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  • 3
    200 mts
    सही
    गलत
  • 4
    210 mts
    सही
    गलत
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उत्तर : 3. "200 mts"
व्याख्या :

Answer: C) 200 mts Explanation: Let the length of the train be 'L' mts let the speed of the train be 'S' m/s Given it crosses a pole in 10 sec=> L/S = 10 ......(1)Given it takes 20 sec (double of pole) to cross a platform of length 200 mts => (L + 200)/S = 20 => L/S + 200/S = 20 But from (1) L/S = 10 => 200/S = 20 - 10 => S = 20 m/s Then, from (1) => L = 10 x 20 = 200 mts. Hence, the length of the train = 200 mts.

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