The wheel of an engine of 300 cm in circumference makes 10 revolutions in 6 seconds. What is the speed of the wheel (in km/h)?
A. 18
B. 20
C. 27
D. 36
Answer: Option A
Solution (By Examveda Team)
Circumference = One revolution Distance covered in 10 revolutions = 300 * 10 = 3000 cm = 30 m 30 meters are covered in 6 seconds. Speed of the wheel = $$\frac{{30}}{{\text{6}}}$$ = 5 m/s 5 m/s = $$\frac{{5 \times 18}}{5}$$ = 18 km/h. [ To convert m/s to km/h, we use to multiply by factor $$\frac{{18}}{5}$$ ]This Question Belongs to Arithmetic Ability >> Speed Time And Distance
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