A person wishes to reach his destination 90 km away 3 hours but for the first ha

Question

A person wishes to reach his destination 90 km away 3 hours but for the first half of the journey his speed was 20 km/hr. His average speed for the rest of the journey should be :

Options:

A . 4 km/hr

B . 0.75 km/min

C . 1 km/min

D . None of these

Answer: Option C

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