Ritu can row downstream 20 km in 2 hours
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Ritu can row downstream 20 km in 2 hour, and upstream 4 km in 2 hours. Find her speed of rowing in still water and the speed of the current
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Answer:
Step-by-step explanation:
Given :-
Ritu can row downstream 20 km in 2 hour, and upstream 4 km in 2 hours.
Solution :-
Let the speed of Ritu in still water and the speed of stream be x km/h and y km/h.
Upstream = (x – y) km/h
Downstream = (x + y) km/h
According to the question,
⇒ 2(x + y) = 20
⇒ x + y = 10 ... (i)
⇒ 2(x – y) = 4
⇒ x – y = 2 ... (ii)
Putting this equation in (i), we get
⇒ y = 4
Ritu’s speed in still water is 6 km/h
The speed of the current is 4 km/h.
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