Question

Convert 75m/s into km/h

Answer 1

To convert into km/hr we need to multiply by 18/5.So,
75*18/5=270km/hr.

Answer 2

$75 \frac{m}{s} \frac{1}{1000} \frac{km}{m} \frac{3600}{1} \frac{sec}{h}$
$75 \times \frac{3600 }{1000}$
$75 \times 3.6$
=270 km / h