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

Answer:

$x=70$

Step-by-step 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...

$300=3(x+30)$

$100=x+30$

$x=70$