A person covers half of his journey at 30 km hr and the remaining half at 20 km hr The average speed...........

Quantitative Aptitude ( CCS) Time & distance

A person covers half of his journey at 30 km/hr and the remaining half at 20 km/hr. The average speed for the whole journey is

24 km/hr

28 km/hr

32 km/hr

None of these

Given, A = 30 km/h, B = 20 km/h
According to the formula, 2AB/A+B
Required average speed
= 2×30×20/30+20 = 1200/50 = 24km/h

Hence, option 1 is the correct answer.

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