Question

Convert 3 m/s into km/hr.

Answer 1

1 m = 10^-3 km; 1s = \(\frac{1}{3600} hr.\)   

1 m/s = \(\frac{1}{1000}\,\times\,3600 = \,\frac{18}{5}\,km/hr.\)      

3 m/s = \(\frac{18}{5}\,\times\,3\, km/hr = \frac{54}{5}\,km/hr.\)