Boats and Streams Formulas with examples for SSC and Bank Exams
Ratio of time taken by a sailor to cover some distance upstream and downstream is 4 : 1. If speed of stream is 4.5 km/hr. Then find out speed of boat?
(A) 8.5 km / hr
(B) 9.5 km / hr
(C) 7.5 km / hr
(D) 8 km / hr
Correct Answer : C
A motorboat covers a certain distance downstream in a river in 3 hours. It covers the same distance upstream in 3 and half an hour. If the speed of the water is 1.5 km / h, then the speed of the boat in still water is:
(A) 19.5 km/h
(B) 19 km/h
(C) 17 km/h
(D) 17.5 km/h
Correct Answer : A
A boat goes 30 km upstream and 44 km downstream in 10 hours. In 13 hours, it can go 40 km upstream and 55 km downstream. The speed of the boat in still water is.
(A) 8 km / h
(B) 3 km / h
(C) 4 km / h
(D) None of these
Correct Answer : A
A boat moves downstream at the rate of 1 km in $$7{1\over 2}$$ minutes and upstream at the rate of 5 km an hour. What is the speed of the boat in the still water?
(A) 4 km/hour
(B) 3 km/hour
(C) 8 km/hour
(D) $$6{1\over 2}$$ km/hour
Correct Answer : D
A motorboat can travel at 10 km/hr. in still water it travelled 91 km downstream in a river and then returned taking at together 20 hours. Find the rate of flow of the river
(A) 5 km/hr
(B) 8 km/hr
(C) 3 km/hr
(D) 6 km/hr
Correct Answer : C
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