1.

A covers 1/3rd of his journey at the speed of 10 km/h and half of the rest at the speed of 20 km/h and rest at the speed of 30 km/h.What is the average speed of A?

Answer»

6(2/11)km/h
16(4/11)km/h
16(4/11)m/s
none of these

Answer :B


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