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A man can row upstream at 12km/hr and downstream at 18 km/hr. The man rowing speed in still water is?
Answer & Solution
Correct Answer:
Option
A
Speed of boat in still water = $$\frac{{x + y}}{2}$$
Where (x = downstream speed) and (y = upstream speed)
∴ Boat's speed
$$\eqalign{ & {\text{ = }}\frac{{18 + 12}}{2} \cr & = \frac{{30}}{2} \cr & = 15\,km/hr \cr} $$
Where (x = downstream speed) and (y = upstream speed)
∴ Boat's speed
$$\eqalign{ & {\text{ = }}\frac{{18 + 12}}{2} \cr & = \frac{{30}}{2} \cr & = 15\,km/hr \cr} $$
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