Aishwarya is going to cover a distance of 360 km from Ambala to Khandala. The first one- third of the distance she covers on a cycle. The second one -third she covers by an auto- rickshaw and the remaining distance she travels by car . The average speed of the journey by a car is 5 times the average speed by cycle and 20 km/h more than the average speed by auto - rickshaw but she took 1 hour more by auto - rickshaw than by car. What is the average speed of the whole journey?

Options

A. 10 h
B. 12 h
C. 15 h
D. none of these

Answer

C