Question

A vehicle moving with a speed of $18km{h}^{-1}$ covers in $1s$.

• A. 1 m
• B. 5 m
• C. 10 m
• D. 18 m

Answer 1

Answer: (B)

$v=\frac{18km}{h}=\frac{18km}{h}\times \left(\frac{1000m}{1km}\right)\times \left(\frac{1hr}{3600s}\right)$
$=\frac{18\times 1000}{3600}\frac{m}{s}=5m/s$