Question

If the circumference of the playground us 220m,find the radius of the playground​

Answer 1

Answer:

circumference=2pie.r

220=2×22/7×r

220×7/44=r

35=r

Answer 2

Step-by-step explanation:

• SOLUTION

Circumference of circular playground = 220 m.

let, r1 = inner radius of circular playground

⇒ 2πr1 = 220 m.

⇒ 2 × 22/7 × r1 = 220

⇒ r1 = (220×7)/(2 × 22 ) = 35m

.

Thus, Outer radius r2 = 35 + 7 = 42 m

So,

Area of path = π[(r2)2 – (r2)2]

= (22/7)(422 – 35²

= (22/7)(42 + 35)(42 - 35)

= (22/7)×77×7

= 1694 m2

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