Question

A river is flowing at the rate of 2.4 miles an hour when a boy rows across it. If the boy rows at a still-water speed of 3.1 miles per hour and heads the boat perpendicular to the direction of the current. The ground speed of the boat is 3.9 miles per hour.
true or false?

Answer 1

use Pythagorean theorem to find the ground speed

Answer 2

you have a right triangle

Answer 3

i dont understand

Answer 4

by using the pythagorean theorem i got 15.37
what does that mean?

Answer 5

@perl