Question

the diameter of a road roller is 70cm and its length is 1m . it takes 250 revolutions to move once over to level a playground . find ares of the playground in m²




plz fast ​

Answer 1

Answer:

70cm = 0.7m

diameter = 0.7 => radius = 0.7/2

road roller is a kind of cylinder

C.S.A of road roller = 2πrh = 2 × 22/7 × 0.7/2 × 1

= 2.2m²

for 1 revolution ................. 2.2m²

then, for 250 revolutions ........... ?

= 250×2.2 = 550m²

SO, THE AREA OF PLAY GROUND = 550M²

Step-by-step explanation:

Please mark me as brainliest