Question
Two athletes start running on a circular track of length
1,500 metres in the same direction at speeds of 20 m/s and 18 km/h respectively. How many times will they meet in 10 minutes?Solution
ATQ, 18 km/h = 18 × (5/18) = 5 m/s
Relative speed = 20 − 5 = 15 m/s
Time interval after which they meet = (1,500 ÷ 15) = 100 seconds
Required number of times = (10 × 60) ÷ 100 = 6 times
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