1. The diameter of the driving wheel of a cart is 154 cm. Calculate the revolution per minute [RPM] of the wheel in order to keep a speed of 33 Kilo meter per hour.
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By: anil on 05 May 2019 02.07 am
Diameter of driving wheel = 154 cm => Circumference (1 revolution) of wheel = $$2pi r$$ = $$2 imesfrac{22}{7} imes77=484$$ cm => In 1 minute, the wheel covers = 4.84 m Thus, in 1 hour, distance covered = $$4.84 imes60=290.4$$ m $$ herefore$$ In order to keep a speed of 33 km/hr, rpm = $$frac{33}{0.2904}=113.63approx114$$ => Ans - (A)
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