Question

Atul walks 4 km at a speed of 2 km/h, runs 10 km at a speed of 6 km/h and goes by bus for another 45 km. The speed of the bus is 30 km/h. Find the average speed of Atul.

A 11(13/31) km/h
B 11(31/13) km/h
C 12(14/41) km/h
D 12(41/14) km/h
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