Question

the diameter of a roler is 84cm and l=120cm. it takes 500 complete revolutions to move once over to level play ground. find the area in m²

Answer 1

d = 84cm
r = 84/2 = 42 cm
l = 120 cm

CSA = 2πrh = 2×(22/7)×42×120 = 31680 cm² = 3.168 m²
total revolutions = 500
Area levelled = 500×3.168 = 1584 m²