Math, asked by dexter22, 5 months ago

It takes 15 hours for a boat to reach its destination and return to itis initial place if the river has no flow.
For the same journey it requires 16 hours if the river is flowing. The difference between the speeds of boat and river is 15 kmph. Find the speed of the river?

Step by step solution

Answers

Answered by mithleshjham

0

Time taken in downstream =

15+5

d

=

20

d

Time taken in upstream =

15−5

d

=

10

d

∴ Average speed =

20

d

+

10

d

2d

=

3

40

km/hr

So,

Speed in still water

Average speed

=

15

40/3

=

45

40

=

9

8

.

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