Question

Rita can row downstream 20 km in 2 hours and upstream 4 km in 2 hours find the speed of the proverb still water and the speed of the current

Answer 1

HEY MATE HERE IS YOUR ANSWER--

(i) Let speed of rowing in still water = x km/h

Let speed of current = y km/h

So, speed of rowing downstream = (x + y) km/h

And, speed of rowing upstream = (x − y) km/h

According to given conditions,

⇒ 2x + 2y = 20 and 2x − 2y = 4

⇒ x + y = 10 … (1) and x – y = 2 … (2)

Adding (1) and (2), we get

2x = 12⇒ x = 6

Putting x = 6 in (1), we get

6 + y = 10

⇒ y = 10 – 6 = 4

Therefore, speed of rowing in still water = 6 km/h

Speed of current = 4 km/h

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