Question

The radius of a circular wheel is 7 / 4 m. How many revolutions will it make in travelling 11 km

Answer 1

I hope this will help u

Answer 2

1000 revolutions the wheel will make in travelling 11 km.

A revolution made by a circular wheel is nothing but its circumference.

So, for a circle with radius 'r', we know that, its circumference is given as 2Пr.

So, for a circle with radius 7/4 m, its circumference would be:

2 × (22/7) × (7/4) m                        [П = 22/7]

= 44/4 m

= 11 m.

Thus, the distance covered by the wheel in 1 revolution is 11m.

Or, in 11m, the wheel covers 1 revolution.

So, by unitary methid, in 1 m, the wheel covers (1/11) revolutions

And, to cover 11000m (11km), the wheel covers (11000/11) = 1000 revolutions.

[1km = 1000m]

So, the wheel covers 1000 revolutions to travel 11km.