Discussion of Question with ID = 044 under Boats-and-Streams

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Question

The speed of an aircraft in still air is 10 km/h and rate of wind is 4 km/h. If it travels along the direction of the wind for 4 hours, what is the distance travelled by the aircraft during the journey?

A

56 km.

B

57 km.

C

55 km.

D

59 km.

Soln.
Ans: a

The effective speed of the aircraft in the air is 10 + 4 = 14 km/h. The distance is speed × time = 14 × 4 = 56 km.


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