A man can row upstream at 12km/hr and downstream at 18 km/hr. The man rowing speed in still water is?
A. 15 km/hr
B. 5 km/hr
C. 3 km/hr
D. 10 km/hr
Answer: Option A
Solution (By Examveda Team)
Speed of boat in still water = $$\frac{{x + y}}{2}$$Where (x = downstream speed) and (y = upstream speed)
∴ Boat's speed
$$\eqalign{ & {\text{ = }}\frac{{18 + 12}}{2} \cr & = \frac{{30}}{2} \cr & = 15\,km/hr \cr} $$
This Question Belongs to Arithmetic Ability >> Boats And Streams
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