Question

The cost of fencing of our village play ground with railing is 924 at the rate of 21 per
meter. Let us write by calculating how much sq. meter canvas will be bought for covering
the field.​

Answer 1

Step-by-step explanation:

Given, the cost of fencing = Rs 924

Now cost of fencing = perimeter of playground × rate of fencing ground per meter

⇒ 924 = perimeter × 21

⇒

= 44 m

But, Perimeter = 2πr where r is the radius of the play ground

⇒

= 7 m

Canvas required will be calculated by calculating the area of the circular field

Area of circular field = πr2 where r is the radius of the play ground

⇒

⇒ 154 m2

Answer 2

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Given, the cost of fencing = Rs 924

Now cost of fencing = perimeter of playground × rate of fencing ground per meter

⇒ 924 = perimeter × 21

⇒

= 44 m

But, Perimeter = 2πr where r is the radius of the play ground

⇒

= 7 m

Canvas required will be calculated by calculating the area of the circular field

Area of circular field = πr2 where r is the radius of the play ground

⇒

ᴀɴs :)

⇒ 154 m2