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A man covers a distance of 100 km partly by bus at 40 km/hr and partly by scooter at 30 km/hr. His average speed for the whole journey was 32 km/hr. How far did he go by bus?

A) 20 km
B) 25 km
C) 30 km
D) 40 km

Correct Answer:


B) 25 km

Description for Correct answer:

x km at rate of 40 kmph and (100 - x) km at rate of 30 kmph

Average speed = \( \Large = \frac{Total \ distance}{Total \ time} \)

\( \Large 32 = \frac{100}{\frac{x}{40}+\frac{100 - x}{30}} \)

\( \Large x = 25 km \)

Part of solved Time and Distance questions and answers : >> Aptitude >> Time and Distance

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