A rowing team rowed 90 miles while going with the current in the same amount of time as it took to row 10 miles going against th

Question

vichka [17]

3 years ago

13

A rowing team rowed 90 miles while going with the current in the same amount of time as it took to row 10 miles going against th

e current. The rate of the current was 4 miles per hour. Find the rate of the rowing team in still water.

Mathematics

1 answer:

lys-0071 [83] · Answer 1 · 2022-01-25T12:33:55+03:00

Answer:
let x=rate of the rowing team in still water
x+4=rate of the rowing team with current
x-4=rate of the rowing team against current
travel time=distance/rate
..
90%2F%28x%2B4%29=10%2F%28x-4%29
90x-360=10x+40
80x=400
x=5  rate of the rowing team in still water=5 mph