A boy on tour travels first 160 km at 64 km hr and the next 160 km at 80 km hr The average speed for...........

Quant (SSC) Time & distance

A boy on tour travels first 160 km at 64 km/hr and the next 160 km at 80 km/hr. The average speed for the first 320 km of the tour is

35.55 km/hr

36 km/hr

71.11 km/hr

71 km/hr

Total time taken=(160/64 + 160/8)hrs
= 9/2 hrs.
Average speed=(320 x 2/9) km.
=71.11 km/hr.

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