Question

answer it please please please please please please

Answer 1

Roller is a cylinder.

LSA of cylinder = 2pi ☓ r ☓ h.

LSA = 2 ☓ 22 /7 ☓ 21 /2 ☓ 40

LSA = 2640 cm^2

Now, no of revolution = 300

So, total area covered = 2640 ☓ 300

Total area covered = 792000 cm^2

AREA OF ROOM = AREA COVERED BY ROLLER

In metre ^2 :

Area of room = 792000/100 ☓ 100

Area of room = 79.2 m^2.

HENCE, AREA OF ROOM = 79.2 M^2.

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