Question

the diameter of a 120 cm long roller is 84 cm It takes 1000 complete revolutions in moving once over to level a playground what is the area of the playground​

Answer 1

Answer:

Area of Playground is 3,168m²

Explanation:

Length of roller = 120 cm.

Diameter of roller = 84 cm.

Radius of roller = 1/2 84= 42 cm

As we know, a roller is in the shape of cylinder.

Perimeter of roller = Area covered by roller in 1 one revolution = 2 × π × (radius ) × length

Perimeter = 2×( 22/7 ) × 42 × 120

                  = 44 × 6 × 120

                 = 31,680 cm²

Therefore,

Area covered by wheel in 1000 revolutions

= (31,680×1000) cm²

= 3,168m²

Hence, Area of Playground is 3,168m²

Please mark Brainliest !

Answer 2

$\huge\mathtt{\fbox{\red{Answer✍︎}}}$

Answer:

Area of Playground is 3,168m²

Explanation:

Length of roller = 120 cm.

Diameter of roller = 84 cm.

Radius of roller = 1/2 84= 42 cm

As we know, a roller is in the shape of cylinder.

Perimeter of roller = Area covered by roller in 1 one revolution = 2 × π × (radius ) × length

Perimeter = 2×( 22/7 ) × 42 × 120

                  = 44 × 6 × 120

                 = 31,680 cm²

Therefore,

Area covered by wheel in 1000 revolutions

= (31,680×1000) cm²

= 3,168m²

Hence, Area of Playground is 3,168m²