Question

A car travels at the speed x + 30 kilometers in one hour, where x is an unknown. Find x if this car covers 300 kilometers in 3 hours?

Answer 1

`x=70`

Explanation:

We know that the car travels at speed
`x+30` per hour. Thus, after
`h` hours, it will have traveled
`h(x+30)` kilometres.

We are given that it traveled 300 kilometres after 3 hours. So, we have...

`300=3(x+30)`

`100=x+30`

`x=70`