Question

cuboid. Qu 2 The diameter of a
roller is 80 cm and length is 126
cm. It takes 750 complete
revolutions moving once over to
Level a playground. Find the area
of a playground.
*​

Answer 1

Answer:

Diameter of roller= 80cm

Radius of roller =40cm

Length/Height = 126cm

LSA of cylinder= 2πrh=2×22/7×40×126

= 31680cm²

Roller covers area in 1 revolution = 31680cm

Roller covers area in 750 revolutions= 750×31680

= 23760000cm

So Area of the playground=23760000cm²