Question

A circular field has a circumference of 360 km . Two cyclist Aayush and Aryan started together and can cycle at speeds of 12km/hr and 15km/hr, respectively, round the circular field . After how many hours will they meet again at starting point ?

Answer 1

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Answer 2

Answer:Clearly the cyclist moves both ways at a speed of 12 km/hr.

The boat sailor moves downstream @ (10+4)i.e.,14 km/hr and upstream @ (10-4)i.e., 6km/hr.

So,average speed of the cycle sailor=(2*14*6/14+6)km/hr

=42/5 km/hr=8.4 km/hr.

since the average speed of the cyclist is greater ,he will return ta A first.

Step-by-step explanation: