Diameter of wheel of a cycle is 7 cm. A cyclist takes 75 minutes to reach a destination at the speed of 36.3 km/hr. How many revolutions will the wheel make during the journey ?

206250

As we know ,

The circumference of the circle = 2 × π × (The radius of the circle)

 The circumference of the wheel = 2 × \(\frac{22}{7}\) × \(\frac{7}{2 ×100 }\) = 0.22 m

 The total distance = (75 × 60) × (36.3 ×  \(\frac{5}{18}\) ) = 45275 m

 The total round taken by wheel =  \(\frac{45375}{0.22}\) = 206250

So ,  The required number of revolutions are  206250.