IIT JEE प्रश्न और उत्तर का अभ्यास करें

प्र: Equal quantities of three mixtures of milk and water are mixed in the ratio 1:2, 2:3 and 3:4. The ratio of water and milk in the mixture is ? 3630 0

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    193 : 122
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  • 2
    97 : 102
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  • 3
    115 : 201
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  • 4
    147 : 185
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उत्तर : 1. "193 : 122"
व्याख्या :

Answer: A) 193 : 122 Explanation: Given the three mixtures ratio as (1:2),(2:3),(3:4) (1+2),(2+3),(3+4) Total content = 3,5,7   Given equal quantities of the three mixtures are mixed, then LCM of 3, 5, 7 = 105 105/3 = 35 , 105/5 = 21 , 105/7 = 15   Now, the individual equal quantity ratios are (35x1, 35x2), (21x2, 21x3), (15x3, 15x4)  i.e (35,70), (42,63), (45,60)   So overall mixture ratio of milk and water is 35+42+45 : 70+63+60 122:193   But in the question asked the ratio of water to milk = 193 : 122

प्र: Which sentence is Punctuated correctly? 3627 0

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    The conference was only supposed to be an hour; however, it ran for nearly two and half hours.
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  • 2
    The conference was only supposed to be an hour, however; it ran for nearly two and half hours.
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  • 3
    The conference was only supposed to be an hour. however, it ran for nearly two and half hours.
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  • 4
    The conference was only supposed to be an hour; however it ran for nearly two and half hours.
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उत्तर : 1. "The conference was only supposed to be an hour; however, it ran for nearly two and half hours."
व्याख्या :

Answer: A) The conference was only supposed to be an hour; however, it ran for nearly two and half hours. Explanation: The correct punctuated sentence is A The conference was only supposed to be an hour; however, it ran for nearly two and half hours.

प्र: Joel introduces Mary as the daughter of the only son of my father’s wife. How is Joel related to Mary ? 3622 0

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    Daughter
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  • 2
    Brother
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  • 3
    Son
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  • 4
    Father
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उत्तर : 4. "Father"
व्याख्या :

Answer: D) Father Explanation: Resolving from the last , In the view of joel,My father’s wife – motherOnly son of mother – himself i.e. joelDaughter of john– daughter. So Joel is Father of Mary.

प्र: Sugar Bowl of the World? 3620 0

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    Cuba
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  • 2
    Brazil
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  • 3
    India
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  • 4
    Australia
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उत्तर : 2. "Brazil"
व्याख्या :

Answer: B) Brazil Explanation: "Cuba" is the name of the country which was commonly known as the "Sugar Bowl of the World". It is called by this name because formerly it was the largest producer of Sugar, but now Brazil is currently the largest producer of Sugar. It is an island country in the Caribbean and is officially called as the Republic of Cuba.

प्र: A large tanker can be filled by two pipes A and B in 60 and 40 minutes respectively. How many minutes will it take to fill the tanker from empty state if B is used for half the time and A and B fill it together for the other half ? 3616 0

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    31 min
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  • 2
    29 min
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  • 3
    28 min
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  • 4
    30 min
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उत्तर : 4. "30 min"
व्याख्या :

Answer: D) 30 min Explanation: Part filled by (A + B) in 1 minute = (1/60 + 1/40) = 1/24Suppose the tank is filled in x minutes.Then, x/2(1/24 + 1/40) = 1(x/2) * (1/15) = 1 => x = 30 min.

प्र: Ayurveda Owes its Origin to 3615 0

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    Yajurveda
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  • 2
    Atharvaveda
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  • 3
    Rigveda
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  • 4
    Samaveda
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उत्तर : 2. "Atharvaveda"
व्याख्या :

Answer: B) Atharvaveda Explanation: Ayurveda Owes its Origin to Atharvaveda.   The early history of ayurveda asserts that around 1500 BC, ayurveda's fundamental and applied principles got organised and enunciated. In this historical construction, Ayurveda traces its origins to the Vedas, Atharvaveda in particular, and is connected to Hindu religion. Atharvaveda (one of the four most ancient books of Indian knowledge, wisdom and culture) contains 114 hymns or formulations for the treatment of diseases. Ayurveda originated in and developed from these hymns. In this sense, ayurveda is considered by some to have divine origin. Indian medicine has a long history, and is one of the oldest organised systems of medicine. Its earliest concepts are set out in the sacred writings called the Vedas, especially in the metrical passages of the Atharvaveda.

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उत्तर : 1. "48"
व्याख्या :

Answer: A) 48 Explanation: 3X + 4y = 240by substitute through options 48 is correct

प्र: The value of a machine depreciates at the rate of 10% every year. It was purchased 3 years ago. If its present value is Rs. 8,748, its purchase price was ? 3615 0

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    Rs.14,000
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  • 2
    Rs.12,000
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  • 3
    Rs. 12,800
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  • 4
    Rs. 15,000
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उत्तर : 2. "Rs.12,000"
व्याख्या :

Answer: B) Rs.12,000 Explanation: We have P = 8748, R = -10 and n = 3Therefore, the purchase price of the machine= P1+R100n= 87481-101003= 8748 x (100/90) x (100/90) x (100/90)= 12,000.   Therefore, the purchase price of the machine was Rs. 12,000.

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