Question

A wheel with diameter 40 cm makes 50 revolution per min. How long will it take to cover a distance of 18840m?​

Answer 1

Diameter of the wheel = 40 cm

RPM = 50

Total distance = 18840 m

= 1884000 cm

Now,

The wheel's radius = 40/2

= 20 cm

Perimeter = (2× π × 20)

= 125.7 cm

Distance covered in one minute

= (perimeter × RPM)

= (125.7 ×50)

= 6285 cm

So,

Wheel covers 6285 cm in = 1 min

1 cm in = 1/6285 min

1884000 cm in = 1884000/6285

= 299.76

= 300 mins

= 5 hours

Hope it will help you

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