Question

A crew can row a certain
course up the stream in 84 minutes
they can row same course down
Stream in 9minutes less than they
can row It its still water.
How long would to they take
to row down the stream​

Answer 1

Answer:

66 minutes

Step-by-step explanation:

They can course up in 84 minutes

They can course down in 9 minutes less than that in still water.

So the upstream course will be 9 minutes greater than that in still water.

So they can row in still water in 84 - 9 = 75 minutes

So they can row downstream in 75 - 9 = 66 minutes