Question

A boy travels with an average speed of $10m{s}^{-1}$ for $20min$. How much distance does he travel?​

Answer 1

Given, Average speed $=10m{s}^{-1}$​
Time taken $=20\text{min}=1200\text{sec}$
To find, Distance covered​:

$\text{Average speed}=\frac{\text{Total distance covered}}{\text{Time taken}}$

$\text{Total distance covered}=\text{Average speed}\times \text{Time taken}$
$=10m{s}^{-1}\times 1200s$
$=12000m=12km$
The distance travelled by boy is $12km$.