The speeds of two runners A and B are in the ratio 5 : 4. In a 500 m race, how much start should A give B for a dead heat?
Correct answer D. 100 m
Explanation
While A runs 500 m, B runs 500 × 4/5 = 400 m. For a dead heat B needs a start of 500 − 400 = 100 m.
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