A car goes 20 metres in a second. Find its speed in km/hr.
A. 20 km/hr
B. 18 km/hr
C. 72 km/hr
D. 36 km/hr
Answer: Option C
Solution (By Examveda Team)
As we know :⇒ 1 m/s = $$\frac{{18}}{5}$$ km/hr
⇒ 20 m/s = $$\frac{{18}}{5}$$ × 20 km/hr
= 72 km/hr

Where the 18/5 comes