IIT JEE प्रश्न और उत्तर का अभ्यास करें

प्र: A work which could be finished in 11 days was finished 4 days earlier after 4 more men joined. The number of men employed was ? 1729 0

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    7
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    8
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    9
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  • 4
    10
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उत्तर : 1. "7"
व्याख्या :

Answer: A) 7 Explanation: As the work is sameM1D1 = M2D2 Here Let the number of men employed was M=> 11M = 7(M+4)=> 11M - 7M = 28=> M = 7

प्र: In a compound, chemical energy is contained in the 1729 0

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    bonds
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    movement of the electrons
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    unbonded electrons
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    nuclei of the atoms
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उत्तर : 1. "bonds"
व्याख्या :

Answer: A) bonds Explanation: chemical energy is contained in the chemical bonds between the reactants in the chemical compounds.

प्र: An express train takes 4 seconds to enter tunnel which is 1 km long. If it is traveling at 108 km an hour, how long will it take to pass completely through the tunnel ? 1729 0

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    33 sec
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    37.33 sec
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    36.43 sec
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    32 sec
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उत्तर : 2. "37.33 sec"
व्याख्या :

Answer: B) 37.33 sec Explanation: Speed = 108 km/hrenter a tunnel,, means that the train covers a distance equal to its own lengthso (108 x 5/18) = x/4 where x= length of trainhence x = 120 mtrsto pass completely train has to travel a distance = (x + tunnel length) that is 1120 mtrs.so (1120/t) = (108x5/18)t = 37.33 sec

प्र: What is true about personal financial planning? 1729 0

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    Personal financial planning is the process of creating and achieving financial goals
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    Our financial decisions decrease once we reach adulthood
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    A family's resources are unlimited
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    There are two means for achieving financial goals—you either need to increase your spending or reduce savings
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उत्तर : 1. "Personal financial planning is the process of creating and achieving financial goals"
व्याख्या :

Answer: A) Personal financial planning is the process of creating and achieving financial goals Explanation: Personal financial planning is the process of creating and achieving financial goals.   True statements regarding personal financial planning: As we age, the number and complexity of the financial decisions that we make increases. There are two means for achieving financial goals—you either need to increase your savings or reduce spending. A family's resources are limited.

प्र: Find the next number in the given number series? 0, 3, 8, 15, 24, ? 1728 0

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    35
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    37
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    34
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    36
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उत्तर : 1. "35"
व्याख्या :

Answer: A) 35 Explanation: Here the given number series is 0, 3, 8, 15, 24, ? The next number in the given series can be found such a way that the number series follows a pattern, 22 - 4 = 032 - 6 = 342  - 8 = 852 - 10 = 1562 - 12 = 2472 - 14 = 35Hence, the next number in the iven series is 35.

प्र: What was the symbol of death of gautama buddha? 1728 0

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    Stupa
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    Bodhi tree
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    Lion
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    Chaitya
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उत्तर : 1. "Stupa"
व्याख्या :

Answer: A) Stupa Explanation: Stupa represents the symbol of death of Gautama Buddha. On the other hand, Bodhi Tree is the symbol of nirvana of Gautama Buddha.

प्र: Namitha sold a powerbank which is at the cost of Rs. 1950 at a loss of 25%. Find at what cost will she have to sell it to get a profit of 25%? 1728 0

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    Rs. 3680
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    Rs. 3560
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    Rs. 3320
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    Rs. 3250
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उत्तर : 4. "Rs. 3250"
व्याख्या :

Answer: D) Rs. 3250 Explanation: Let the Cost price of the powerbank = Rs. P But given that by selling it at Rs. 1950, it gives a loss of 25% => P x 75100 = 1950=>P = 1950 x 10075 = Rs. 2600Now, to get a profit of 25% Selling Price = 2600 x 125100 = Rs. 3250.

प्र: The average of the ages of Sushanth, Krish and Rishi is 43 years and the average of the ages of Sushanth, Rishi and Rohit is 49 years. If Rohit is 54 years old, what is Krish's age ? 1728 0

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    34 years
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    26 years
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    24 years
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    36 years
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उत्तर : 4. "36 years"
व्याख्या :

Answer: D) 36 years Explanation: Let present ages of Sushanth = w, Krish = x, Rishi = y and Rohit = z , thenw + x + y = 43 x 3 = 129 ---(i) andw + y + z = 49 x 3 = 147 ---(ii)Subtracting (i) from (ii), (w+y+z) - (w+x+y) = 147 - 129 , z - x = 18 ---(iii)Given Rohit's age=z=54, so from (iii), x = 54 - 18 = 36.Therefore, Krish age is 36 years.

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