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
The speed of a boat downstream is 15 km/hr. and the speed of current is 3 km/hr. Find the total time taken by the boat to cover 15 km upstream and 15 km downstream.
(A) 3 hours 10 minutes
(B) 2 hours 30 minutes
(C) 2 hours 40 minutes
(D) 2 hours 42 minutes
A boat goes 75 km upstream in 3 hours and 60 km downstream in 1.5 hours. Then the speed of the boat in still water is:
(A) 65 kmph
(B) 60 kmph
(C) 32.5 kmph
(D) 30 kmph
A boat takes half time in moving a certain distance downstream than upstream. what is the ratio between the rate in still water and the rate of current?
(A) 2 : 1
(B) 3 : 1
(C) 1 : 2
(D) 1 : 3
A boat running downstreams covers a distance of 30 kms in 2 hours. While coming back the boat takes 6 hours to cover the same distance. If the speed of the current is half that of the boat, what is the speed of that boat in kmph?
(A) 15
(B) 5
(C) 10
(D) Cannot be determined
(E) None of these
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