Question

Meena can row demonstream 20 km in 2 hour and upstream 4 km in 2 hour Find her speed of still water and speed of current

Answer 1

Answer:

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Answer 2

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Let speed of meena in still water = x km/h

Speed of stream = y km/h

Then downstream speed of meena = x + y

Upstream speed of meena = x - y

According to question

20x+y=220x+y=2

=> x +y = 10 .... (1)

Also

4x−y=24x−y=2

=> x - y = 2 ..... (2)

Add (1) and (2)

2x = 12

=> x = 6

From (1), we get

6 + y = 10

=> y = 4

speed of meena in still water = 6km/h

Speed of stream = 4km/h