state gov Kolkata Police Constable Mock Test 2024 Quantitative Aptitude Speed Time and Distance Boat and River
A boat can cover a distance of 40 km running downstream in 2 hours, when the speed of stream is 5 km/hr. In how much time will it cover a distance of 40 km upstream, when the speed of stream is 10 km/hr?
1
2 hours
2
4 hours
3
5 hours
4
8 hours