Question

Arrange the following speeds in increasing order:
$10m{s}^{-1}$, $1km{min}^{-1}$, $18kmph$

• A. $10m{s}^{-1}$, $1km{min}^{-1}$, $18kmph$
• B. $18kmph$, $10m{s}^{-1}$, $1km{min}^{-1}$
• C. $18kmph$, $1km{min}^{-1}$, $10m{s}^{-1}$
• D. $1km{min}^{-1}$, $18kmph$, $10m{s}^{-1}$

Answer 1

Answer: (B)

$18kmph$, $10m{s}^{-1}$, $1km{min}^{-1}$

$1km.{min}^{-1}$ = $\frac{1000}{60}$ $m{s}^{-1}=16.67m{s}^{-1}$
$18kmph=\frac{18\times 1000}{3600}m{s}^{-1}=5m{s}^{-1}$
Hence option B is the correct order.