A sailor sails a distance of 48 km along the flow of a river in 8 h If it takes 12 h to return the s...........

Quant (SSC) Boats and Streams

A sailor sails a distance of 48 km along the flow of a river in 8 h. If it takes 12 h to return the same distance, then the speed of the flow of the river is

0.5 km/hr

1 km/hr

1.5 km/hr

2 km/hr

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Explanation:

Rate downstream = 48/8 = 6 km/hr
Rate upstream = 48/12 = 4 km/hr
Speed of current = 1/2 [Downstream rate – Upstream rate]
= 1/2 [6 - 4]
Speed of the current = 1 km/hr.