Question

The length of a roller of levelling the soil is 91 cm and the radius of its circular part is 30 cm. This roller rolls 100 revolutions on the soil, then how much sq metre of soil is levelled?

Answer 1

Dear Student,

◆ Answer -

Soil levelled = 171.44 m^2

◆ Explaination -

Distance travelled by roller in 100 rev will be -

Distance = perimeter × no of revolutions

Distance = 2πr × n

Distance = 2 × 3.14 × 0.3 × 100

Distance = 188.4 cm

Surface area of soil that is levelled is -

Area = distance travelled × length of roller

Area = 188.4 × 0.91

Area = 171.44 m^2

Therefore, 171.4 sq.m area of soil is levelled by the roller.

Best luck...