22 points question! A wheel is of diameter 70 cm. If it makes 500 revolutions in 5 minutes, find its speed in km/h. About the author Elliana
Since the diameter of the wheel is 70m, its radius is 35m. In one revolution, the wheel covers the distance of one circumference. Circumference of the wheel of radius 35m =2×22/7×35 =220m Distance travelled in 500 revolutions =500×220m =110000m Speed = Time/Distance = 110000m/5 min = 110000/5×60seconds =18/3 m/s m/s can be converted to km/hr using the formula m/s ×3.6= km\hr Now, 18/3×3.6=13.2km/hr Reply
Since the diameter of the wheel is 70m, its radius is 35m.
In one revolution, the wheel covers the distance of one circumference.
Circumference of the wheel of radius 35m
=2×22/7×35
=220m
Distance travelled in 500 revolutions =500×220m
=110000m
Speed = Time/Distance
= 110000m/5 min
= 110000/5×60seconds
=18/3 m/s
m/s can be converted to km/hr using the formula m/s ×3.6= km\hr
Now, 18/3×3.6=13.2km/hr