Question

Two cars leave a city at the same time, one traveling east and other traveling west. The car going east is traveling at 60mph and the car traveling west is traveling at 70mph. How long before they are 455 miles apart?

Answer 1

Given:

Two cars leave a city at the same time, one traveling east and the other traveling west.

The speed of the car traveling east = 60 mph

The speed of the car traveling west = 70 mph

After time = t

The distance traveled by east car = 60t

The distance traveled by west car = 70t

When they are 455 miles apart:

`70t+60t=455`

Solve for t:

`\begin{gathered} 130t=455 \\ t=(455)/(130)=3.5 \end{gathered}`

So, the answer will be:

After 3.5 hours, they are 455 miles apart.