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Question

# Tarun can cover a certain distance in 1 hr 24 min by covering 23 of the distance at 4 km/hr and the rest at 5 km/hr. The total distance is:

A
5 km
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B
6 km
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C
8 km
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D
9.2 km
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Solution

## The correct option is C 6 kmLet the total distance is x km.Total time=1 hr 24 min=2115minTarun covers 23 of the distance at 4 km/hr then time to cover this distance=23s4Remaining distance=s−23s=13sTarun covers rest of the distance at 5 km/hr then time to cover rest distance=13s5∴2115=212s+115s⇒2115=1460s⇒s=14×1521×60=6km

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