Question
A walks around a circular field at the rate of one round per hour while B runs around it at the rate of six rounds per hour . The start in the same direction from the same point a 7.30 a.m. They shall first cross each other at :
Answer: Option A
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Since A and B move in the same direction along the circle, so they will first meet each other when there is a difference of one round between he two.
Relative speed of A and B = (6 - 1) = 5 rounds per hour.
Time taken to complete one round at this speed = `1/5`hr. = 12 min.
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