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I carried 1000 kg of watermelon in summer by train. In the beginning the water content was 99%. By the time I reached the destination, the water content had dropped to 98%. The reduction in the weight of the watermelon was(a) 10 kg(b) 50 kg(c) 100 kg(d) 500 kg |
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Answer» Answer is : (d) 500 kg We have, 1000 kg of watermelon in which 99% are water. ∴ 990 kg water and 10 kg rest. Now, x kg watermelon has = 98/100 x water + 2x/100 rest Weight of solid part should remain same ∴ 2x/100 = 10 ⇒ x = 500 ∴ Weight reduction = (1000 - 500) kg = 500 kg |
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