Question

If the wheel of a carriage $500$ cm in circumference takes $\frac{1}{2}$ second more to complete one revolution, the rate of the carriage per hour will be reduced by $3$ km/h. How fast is the carriage travelling ?

Answer 1

$2\pi r=500cm$

Speed $=\frac{500}{1/2}=1000cm/sec$

Speed $=10m/sec=36km/h$

Now after reducing speed by $3km/h$

Speed $=36.3=33km/h$