In a race, an athlete covers a distance of 372 m in 186 sec in the first lap. He covers the second lap of the same length in 62 sec. What is the average speed (in m/sec) of the athlete?
A2
B1
C3
D4
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A and B are two cities. A man travels from A to B at 35 km/ hr and returns at the rate of 15 km/hr. Find his average speed for the whole journey?