Multiple Choice Questions

A boat can cover 21 km in the direction of current and 15 km against the current in 3 hours each Fin...........

Numerical Ability Boats and Streams

A boat can cover 21 km in the direction of current and 15 km against the current in 3 hours each. Find the speed of current.

4.5 km/hr

2.5 km/hr

3 km/hr

1 km/hr

Solution:
Downstream speed = 21/3 = 7 km/hr
Upstream speed = 15/3 = 5 km/hr
So speed of current = 1/2 * (7-5) =1 km/hr

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