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A and B take part in 100 m race. A runs at 5 kmph. A gives B a start of 8 m and still beats him by 8 seconds. The speed of B is: ?->(Show Answer!)
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1. A and B take part in 100 m race. A runs at 5 kmph. A gives B a start of 8 m and still beats him by 8 seconds. The speed of B is:





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  • By: guest on 01 Jun 2017 05.48 pm
    A's speed = 5 x 5 m/sec = 25 m/sec. 18 18 Time taken by A to cover 100 m = 100 x 18 sec = 72 sec. 25 Time taken by B to cover 92 m = (72 + 8) = 80 sec. B's speed = 92 x 18 kmph = 4.14 kmph. 80 5
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