# Pratap Puri rowed 18 miles down the Delaware River in 2 hours, but the return trip took him 42 hours. How do you find the rate Pratap can row in still water and find the rate of the current?

##### 1 Answer

Oct 18, 2016

#### Explanation:

Let Puri's rowing speed be

be

Resultant ( effective )

speed X time = 2(v+P+v_C)= distance = 18 miles.

For the up stream rowing,

#42 ( v_P-v_C)= 18 miles.

Solving,

.