Question

Two​ high-speed ferries leave at the same time from a city to go to the same island. The first​ ferry, the​ cat, travels at 34 miles per hour. The second​ ferry, the​ bird, travels at 24 miles per hour. In how many hours will the two ferries be 40 miles​ apart?

Answer 1

Answer-  In 4 hours the two ferries will be 40 miles​ apart.

Solution-

It is a relative speed problem.

The speed of the first ferry = 34 mph

The speed of the second ferry = 24 mph

Relative speed of the two ferries = 34 - 24 = 10 mph

Relative distance between the two ferries = 40 miles

We know that,

$Relative \ speed = \frac{Relative \ Distance}{Time}$

⇒ $Time=\frac{Relative \ Distance}{Relative \ Speed} = \frac{40}{10} = 4 \ hours$