Question

Write true or false :
The speed $5m{s}^{-1}$ is less than $25km{h}^{-1}$.

Answer 1

As we know,
$1km=1000m$ and $1hour=3600s$

So,

$25\frac{km}{h}=\frac{25\times 1000}{3600}\frac{m}{s}=6.94\frac{m}{s}$

$5m{s}^{-1}<6.94m{s}^{-1}$ or $25km{h}^{-1}$

So, the speed $5m{s}^{-1}\text{is less than}25km{h}^{-1}$.

Hence the given statement is $\text{True}$.