Question

The diameter of a cylindrical role is 9.1 cm and 2.8 m long . find the area it will cover in 30 revolutions

Answer 1

Answer:

240240cm^3

Step-by-step explanation:

Given that

diameter of role - 9.1 cm (radius- 4.55)

length -2.8m ( 280cm)

RTF- area covered after taking 30 revolution

curved surface area of cylinder- πdl/2πrl

(22/7)×9.1×280

8008

therefore the curved surface area of cylinder is 8008

total area covered after 30 revolution=

8008×30

240240cm^3

therefore the area covered by the roller is 240240cm^3