A boat sails 15 km of a river towards upstream in 5 hours.
Question 1:
A boat sails 15 km of a river towards upstream in 5 hours. How long will it take to cover the same distance downstream, if the speed of the current is one-fourth the speed of the boat in still water:
A.1.8h
B.3h
FeedbackUpstream speed = B-S Downstream speed = B+s B-S = 15/5 = 3 km/h Again B= 4S Therefore B-S = 3= 3S =>S = 1 and B= 4 km/h Therefore B+S = 5km/h Therefore, Time during downstream = 15/5 = 3h
C.4h
D.5h
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