Question

If a ship travels from one port to another with the average speed of $36km{h}^{-1}$, find its speed in $m{s}^{-1}$.

• A. $5m{s}^{-1}$
• B. $10m{s}^{-1}$
• C. $5m{s}^{-1}$
• D. $20m{s}^{-1}$

Answer 1

The correct option is B $10m{s}^{-1}$

Given:
Average speed, $v=36km{h}^{-1}$
Since $1km=1000m$ and
$1h=3600s$
Therefore, the speed of the ship in $m{s}^{-1}$ is:
$v=36\times \frac{1000}{3600}$
$v=10m{s}^{-1}$