Question

If the circumference of a circular garden is 308 m, find its area. Also, find the cost of grazing it at 4.85 per m​

Answer 1

Answer:

Let the radius of the circle be r cm

Circumference of the circle=308

Therefore,

2πr=308

⇒r=

2×22

308×7

r=49m

Therefore,

Area of the circle=π×(49)

2

=

7

22

×2401

=7546m

2

Answer 2

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Let r be the radius of the circular field

(1) 2πr = 308

$= > \: r \: = \frac{308}{2\pi}$

$= > r = \frac{308}{2} \times \frac{7}{22}$

$= > r = 49m$

$(2)area \: = \pi {r}^{2}$

$= \frac{22}{7} \times {(49)}^{2}$

$= 7546 {m}^{2}$