The speed of a boat in still water is 16 km/hr. It covers 60 km downstream in 3 hours. What is its upstream speed?
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → 12 km/hr
The downstream run gives the stream’s speed; taking it away from the boat’s speed gives the upstream speed.
Downstream speed \(\displaystyle =\frac{60}{3}=20\) km/hr
Speed of the stream \(=20-16=4\) km/hr
Upstream speed \(=16-4=12\) km/hr