state gov Jharkhand Police Constable Mock Test 2023 Quantitative Aptitude Speed Time and Distance Boat and River
A man, rowing a boat, covers a distance of 21 km in 7 hours downstream. He covers (1/3)rd distance in the same amount of time when rowing upstream. Calculate the speed of the stream.
1
1 km/h
2
4 km/h
3
5 km/h
4
7 km/h