state gov PSTCL/PSPCL Clerk Mock Test 2021 Quantitative Aptitude Speed Time and Distance Boat and River
A boat covers 210 km downstream and 100 km upstream in 5 hours while it covers 140 km downstream and 250 km upstream in 7 hrs. Then, what is the speed of the boat in the still water (in km/hr)?
1
50
2
55
3
65
4
60