Karan and Varun started running in a straight line at 5 m/s and 7.5 m/s respectively. If Karan started 90 meters ahead of Varun, how much time will Varun take to catch Karan?
ATQ,
Relative speed of Varun with respect to Karan = 7.5 − 5 = 2.5 m/s Required time = 90/2.5 = 36 seconds
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