Question

A boat takes 2 hours to go 8 km and come back in still water lake. Find time taken for going 8km upstream amd coming back with water velocity 4km/hr

Answer 1

Explanation:

Time=distance/velocityVbr= 8km/hVrg=4km/hLet t1 and t2 be the time taken by boat to travel in upstream and downstream respectivelyUpstream=8-4=4Downstream=8+4=12T1=8/4=2hrT2=8/12=2/3Total time=2+2/3=2 hr and 40 mins