A boat covers a certain distance. The ratio of the time taken by the boat travelling downstream to the time taken travelling upstream is 5 : 7. If the downstream speed is 21 km/h, find the speed of the boat in still water.
Subject: Mathematics | Topic: Arithmetic | Difficulty: MEDIUM
Options
- (A) 13 km/h
- (B) 12 km/h
- (C) 18 km/h
- (D) 9 km/h
Verified Answer
Option (C): 18 km/h
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