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Let the speed of boy = x kmph According to the question, Distance travelled by bus in 12 min with 20 kmph = Distance travelled by boy in 10 min with (20 + x) kmph in opposite direction => 20 × 12/60 = 10/60 (20 + x) => 240 = 200 + 10x => x = 40/10 = 4 kmph.
A man goes downstream with a boat to some destination and returns upstream to his original place in 6 hours. If the speed of the boat in still water and...
Distance between a point of A and point B in a river is 32 km and the flow of the stream is from A to B. If the speed of the boat is 10 km/h and speed o...
A man can row his boat with the stream at 42 km/h and against the stream in 7 km/hours. The man’s rate is
A man rows upstream 36 km and downstream 51 km taking 3 hours each. Find the man’s speed in still water.
A man can row at 36 km/hr in still water. In a stream which is flowing at 12 km/hr, it takes him 3 hrs to a place and back. How far is the place?
The downstream speed of a boat is 8 km/hr more than its upstream speed and the ratio of the speed of the boat in still water to the speed of the stream ...
A man can row at 2 kmph in still water. If the velocity of current is 1 kmph and it takes him 4 hour to row to a place and come back, how far is the place?
The cost price of an item is 60% less than its marked price, which is 50% more than its selling price. What is the profit percent...
A boat covers 24km upstream and 36km downstream in 6 hours while it covers 36km upstream and 24km downstream in 13/2 hours. The speed of the current is....
A steamer covers 80 km in 5 hr. in still water. If the speed of the steamer in still water is 50% more than that of the stream, then time is required fo...
