Question

the diameter of a roller is 84cm and length is 120 cm it takes 500 complete revolutions to move once over to level a playground find the area of a playground in metre square.​

Answer 1

Step-by-step explanation:

Given diameter of the roller (d) = 84 cm

radius (r) = d/2

r = 84/2

r = 42cm

Area of roller = curved surface area of cylinder

From the formula.....

2πrh

= 2 × 22/7 × 42 × 120

= 221760/7

= 31680 cm²

This is for one revolution

Then for 500 revolutions = 500×31680

= 15840000cm²

Now convert it into meters

1 cm = 0.01m

and 1 cm² = 0.0001m²

then

15840000cm²= 1584m²

Thank u.......

Answer 2

check the attachment__________❣️