A man can row 30 km downstream and 20 km upstream in 4 hours. He can row 45 km downstream and 40 km upstream in 7 hours. Find the speed of man in still water?
A. 15 kmph
B. 10 kmph
C. 12 kmph
D. 12.5 kmph
E. None of these
general math mcqs
The time taken by a man to row his boat upstream is twice the time taken by him to row the same distance downstream. If the speed of the boat in still water is 42 kmph, find the speed of the stream?
A. 12 kmph
B. 13 kmph
C. 14 kmph
D. 15 kmph
The speed of a boat in upstream is 60 kmph and the speed of the boat downstream is 80 kmph. Find the speed of the boat in still water and the speed of the stream?
A. 70, 10 kmph
B. 35, 27 kmph
C. 50, 60 kmph
D. 45, 55 kmph
A man whose speed is 4.5 kmph in still water rows to a certain upstream point and back to the starting point in a river which flows at 1.5 kmph, find his average speed for the total journey?
A. 8 kmph
B. 4 kmph
C. 2 kmph
D. 10 kmph
A man rows his boat 85 km downstream and 45 km upstream, taking 2 1/2 hours each time. Find the speed of the stream?
A. 5 kmph
B. 6 kmph
C. 7 kmph
D. 8 kmph
A man can row 6 kmph in still water. When the river is running at 1.2 kmph, it takes him 1 hour to row to a place and black. What is the total distance traveled by the man?
A. 6.24 km
B. 6 km
C. 5.76 km
D. 5.66 km
The speed of a boat in still water is 60kmph and the speed of the current is 20kmph. Find the speed downstream and upstream?
A. 35, 25 kmph
B. 80, 40 kmph
C. 40, 60 kmph
D. 50, 55 kmph
The current of a stream runs at the rate of 4 kmph. A boat goes 6 km and back to the starting point in 2 hours, then find the speed of the boat in still water?
A. 10 kmph
B. 21 kmph
C. 8 kmph
D. 12 kmph
A man swims downstream 30 km and upstream 18 km taking 3 hours each time, what is the speed of the man in still water?
A. 2 kmph
B. 8 kmph
C. 16 kmph
D. 4 kmph
A man swims downstream 72 km and upstream 45 km taking 9 hours each time; what is the speed of the current?
A. 3 kmph
B. 1.5 kmph
C. 13 kmph
D. 6.5 kmph