English, asked by EthicalElite, 8 months ago

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Ritu can row downstream 20km in 2hours and upstream in 2hours.

Find her speed of rowing in still water and the speed of the current.

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Answers

Answered by TheUnknownUser

Ritu can row downstream 20km in 2hours and upstream in 2hours.

Find her speed of rowing in still water and the speed of the current.

The speed of Ritu in still water is 6 km/hr and the speed of the current is 4 km/hr.

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Answered by OoINTROVERToO

GIVEN

Ritu can row

TO FIND

SOLUTION

Ritu can row downstream 20km in 2hours

Speed = distance/time

=> x + y = 20/2

=> x + y = 10 _(i)

Ritu can row upstream 20km in 2 hours.

Speed = distance/time

=> x - y = 20/2

=> x - y = 10 _(ii)

Subtracting Eq. (i) and (ii) we get,

Now, putting the value of x in Eq. (i).

Hence, Speed of boat in still water x is 10 km/hr. and Speed of stream y is 0 km/hr.

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