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The reduction in the speed of an engine is directly proportional to the square of the number of bogies attached to it. The speed of the train is 100 km/hr when there are 4 bogies and 55 kmph when there are 5 bogies. What is the maximum number of bogies that can be attached to the train so that it can move? |
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Answer» Answer: 5 should be the max number of bogies. on 6, its speed will be reduced to zero. train wont move. to be able to move, it should have 5 bogies at max. Step-by-step EXPLANATION: reduction = K X SQUARE of number of bogies. 45 = k (5²-4²) 45= 9k k= 5 now for train to move with 6 bogies, reduction in spd should be less than 55 kmph... 55 > k (6²-5²) 55 > 5 x 11 |
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