Discussion of Question with ID = 064 under Boats-and-Streams

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Question

The speed of an aircraft in still air is 12 km/h and rate of wind is 8 km/h. If it travels along the direction of the wind for 8 hours, what is the distance travelled by the aircraft during the journey?

A

160 km.

B

161 km.

C

159 km.

D

163 km.

Soln.
Ans: a

The effective speed of the aircraft in the air is 12 + 8 = 20 km/h. The distance is speed × time = 20 × 8 = 160 km.

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