Question

the diameter of a garden roller is 1.4m and it is 2m long.how much area will it cover in 5 revolutions

Answer 1

curved surface Area of cylinder= 2XpiaXrh
so, 2x22/7x0.x2
=44x0.1x2
=88x0.1
=8.8msquare
Area covered in 5 revolutions
=8.8x5
=44msquare

Answer 2

Diameter =1.4m
radius = 0.7m
height = 2m
area covered in 1 revolutions= curved surface area of cylinder
                                              =2πrh
                                              =2*22/7*0.7*2
                                              =8.8m
area covered in 5 revolutions= 5*8.8
                                              =44m