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Question

Ratio of speeds of ‘A’ and ‘B’ is 6:7, respectively. If they participate in a 140-metre race and ‘B’ gives ‘A’, a head start of ‘m’ metres, then they finish the race at the same time. Find the value of ‘m’.

A 21 metres Correct Answer Incorrect Answer
B 15 metres Correct Answer Incorrect Answer
C 20 metres Correct Answer Incorrect Answer
D 18 metres Correct Answer Incorrect Answer
E None of these Correct Answer Incorrect Answer

Solution

Let the distance covered by ‘A’ in the time ‘B’ covers 140 metres be ‘x’ metres (x/140) = (6/7) Or, x = 120 So, m = 140 – 120 = 20 metres

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