Question

a road roller makes 1400revolutions . if the radius is 2.5m,the distance covered is?

Answer 1

Helloooo...

here is your answer......

One revolution will cover =2×π× r

= 2 × 22/7 × 2.5
=15.7

15.7×1400

=21980 m

=21.980 km

Answer 2

Number of revolution=Distance covered by wheel/Perimeterof wheel
OR
n = D/2πr
D =1400*2πr
D = 14002*22/7*2.5
D = 22000