Question

a person can row at the rate of 3kmph in still water. if the river is running at 1.2kmph then it takes him 2hours to row to a place and back. how far is the place​

Answer 1

Step-by-step explanation:

let the place at from starting point

$x \: km \:$

time to go that point t1 =

$x \div (3 + 1.2) = x \div (4.2)$

time to return from that point t2 =

$x \div (3 - 1.2) = x \div (1.8)$

$2 = \frac{x}{4.2} + \frac{x}{1.8}$

$2 \times 4.2 \times 1.8 = 6x$

$x = 2.52km$