Question
A boatman rows 2 km in 5 minutes, along the stream and
12 km in 3 hours against the stream. The speed of the stream is:Solution
Rate downstream = 2/5 x 60 = 24 km/hr Rate upstream = 12/3 = 4 km/hr Speed of current = 1/2 (Rate downstream – Rate upstream) ⇒ 1/2 (24 – 4) km/hr = 10 km/hr
A boat covers 36 km downstream in 3 hours and 24 km upstream in 4 hours. Find the speed of the boat in still water and the speed of the stream.
A boat takes 1/12th time in moving a certain distance downstream than upstream. The ratio of the speed of the boat in still water and that of the curren...
A boat can move downstream at 30 km/h and upstream at 18 km/h. If it takes the boatman 10 hours to travel a total of (p + q) km upstream when the stream...
When travelling downstream, a boat takes 6 hours to travel 240 km. If the speed of the stream is (3/8)th of downstream speed of the boat, the...
Find the total distance covered by boat in each upstream and downstream in 6 hours if the speed of boat in still water and speed of current is 18 km/h a...
The speed of a boat in still water is three times the speed of the boat upstream. If the boat takes 30 minutes to cover 30 km downstream, then find the ...
A boy can swim a certain distance downstream in 3 hours and return in 8 hours. If the rate of stream is 5 kmph then what is the speed of boy in still wa...
A man can row his boat with the stream at 15 km/h and against the stream in 8 km/hours. The man’s rate is
The ratio of the speed of the boat in upstream to that of in downstream is 5:9, respectively. If the speed of the current is 7 km/h, then find the speed...
A boat has a speed of 52 km/h in still water. It takes 8 hours to travel from point B to point A downstream. The total distance between the two points ...
