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Question
The speed of a boat in still water is 12 km/h and rate of flow of the stream is 4 km/h. If it travels upstream for 6 hours, what is the distance travelled by the boat during the journey?
A
48 km.
B
49 km.
C
47 km.
D
51 km.
Soln.
Ans: a
Ans: a
The effective speed of the boat in the stream is 12 - 4 = 8 km/h. The distance is speed × time = 8 × 6 = 48 km.