Question

The velocity of a car is $18\frac{m}{s}$. Express this velocity in $\frac{km}{h}$.

• A. 70 km/ hr
• B. 64.8 km/h
• C. 76 km/h
• D. 65.7 km/h

Answer 1

The correct option is B

64.8 km/h

$1\frac{m}{sec}=\frac{\frac{1}{1000}km}{\frac{1}{3600}hr}$

$\therefore 1\frac{m}{sec}=3.6\frac{km}{hr}$

$\therefore 18\frac{m}{sec}=18\times 3.6\frac{km}{hr}$

$=64.8\frac{km}{hr}$

Thus, the velocity of the car is $64.8\frac{km}{hr}$