Question

. A road roller takes one revolution while moving down a
road. If its radius is 70 cm and width is 120 cm, find the area
covered by it in one revolution.​

Answer 1

radius of road roller = 70 cm

width of road roller = 120 cm

because road roller is in cylindrical shape we have to find surface area of cylinder

therefore, curved surface area of = 2πrh

cylinder. = 2×22/7×70×120

= 2×22×10×120

= 440×120

= 52800 cm^2

hence, the road roller cover 52800 cm^2 / 528 m^2 in one revolution