Question

A car covers 200 m while increasing its velocity from 20 m/s o 30 m/s . Compute he acceleration

Answer 1

The distance traveled by the car

$$d=\frac{v_f^2-v_i^2}{2a}$$

So, the acceleration of the car

$$a=\frac{v_f^2-v_i^2}{2d}=\frac{(30\:\rm m/s)^2-(20\: m/s)^2}{2\times 200\:\rm m}=1.25\:\rm m/s^2$$