Question

a diameter of a roller is 84cm and the length is 120cm. ti takes 500 revolutions to move once cover to level a playground .find the area of the playground in m square.

Answer 1

Step-by-step explanation:

diameter =2 radius

radius = 42 cm

length = 120 cm

circumference

$2\pi \: r$

= 2*22/7*42

= 44*6

=264 cm

now it takes 500 revolutions to cover area

so

area = circumference * revolutions

= 264* 500

= 132000 cm

as it is area

$363.32 {cm}^{2}$

Answer 2

hope it's help u dear..!!!