Question

If the length of a roller is 30m ,and its diameter is 14 m.  It takes 15 complete revolutions to move once over to level the floor of the playground.Find the area of the playground. ​

Answer 1

Answer:

1584m^2is ur answer

Step-by-step explanation:

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Answer 2

→ A roller is shaped like a cylinder.

→ Let h be the height of the roller and r be the radius.

→ h = Length of roller = 120 cm

→ Radius of the circular end of roller = r = $(84/2) cm = 42 cm$

→ Now, CSA of roller = 2πrh

→ = 2×(22/7)×42×120

→ = 31680 cm2

→ Area of field = 500×CSA of roller

→ = (500×31680) cm2

→ = 15840000 cm2

→ = 1584 m2.

Therefore, area of playground is 1584 m2. Answer!

hope it helps