state gov WBPSC Clerkship Mock Test 2023 - 24 Quantitative Aptitude Speed Time and Distance Boat and River
A man rows a distance of 16 km upstream in 4 hour while a distance of 36 km downstream in 6 hours. What is the speed of the stream?
1
1.5 kmph
2
None of these
3
7.5 kmph
4
2.5 kmph