Question

The radius of a 120 cm long roller is 42 cm. It takes 1000 complete revolutions moving once over to level a playground. What is the area of the playground ?​

Answer 1

Answer:

3168 sq. m.

Step-by-step explanation:

Area of playground = Distance covered by roller.

Distance covered by roller = LSA of Cylinder*No. of Revolution

Lateral Surface Area = 2*$\pi$*r*h

                                   = 2*22/7*42*120

                                   = 31680 sq.cm.

Distance Covered = LSA*No. of Revolutions

                               = 31680*1000

                               = 31680000 sq. cm.

                               = 3168 sq. meters..