Question

The diameter of a roller is 1.4 m and it
is 2 m long. How much area will it
cover in 5 revolutions?
(A) 30 sqm
(B) 40 sqm
(C)35 sqm
(D) 44 sqm​

Answer 1

Hope it helps!! Mark this answer as brainliest if u found it useful and follow me for quick and accurate answers...

Answer 2

Answer:

44$m^{2}$ area is covered in 5 revolutions by the roller

Step-by-step explanation:

r = d/2

r=1.4/2

r=0.7

Area covered in one revolution= curved surface area of cylinder

                                                   = 2πrh

                                                   = 2 × 22/7 ×0.7 × 2

                                                   = 2 × 22 × 0.1 × 2

                                                   = 8.8

Area covered in 5 revolutions = Area covered in one revolution × 5

                                                  = 8.8 × 5

                                                  = 44