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Mean proportion = √(9 × 16) => √144 = 12
Ratio of speed of boat in downstream and speed of stream is 9:5, if speed of current is 10 km/hr, then find distance travelled (in km) upstream in 6 hours.
The speed of a boat in still water is 8 km/hr and the speed of the stream is 2 km/hr. A man rows to a place at a distance of 30 km and comes back to the...
A boy can swim in water with a speed of 15 km/hr in still water. If the speed of the stream is 5 km/hr, what will be the time taken by the boy to cover ...
The time taken by a boat to travel (5p + 60) km upstream is equal to the time taken to travel (8p - 40) km downstream. Given that...
A man can row at 3 kmph in still water. If the velocity of current is 2 kmph and it takes him 6 hour to row to a place and come back, how far is the place?
A boat can travel 8 km more in downstream than that in upstream, in 8 hours while the difference between the time taken by the same boat to travel 200 k...
Two boats X and Y start towards each other from two places, 140 km apart. Speed of the boat X and Y in still water are 13km/hr and 15km/hr respectively....
A swimmer swims from a point A against a current for 12 minutes and then swims backwards in favour of the current fornext 12 minutes and comes to the po...
Boat ‘A’ can cover 320 km in still water in 16 hours. In still water, if the ratio of the speed of boat ‘A’ to that of ‘B’ is 5:3 and the sp...
A boat travels 315 km downstream in 7 hours and 135 km upstream in 9 hours. Determine the total time the boat takes to cover 150 ...
