Question

The radius of a circular field is 140 m. The cost of fencing its circumference at the rate of₹ 1 per meter is

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Answer 1

★Answer★

The circumference of circle = 2πr

$\implies \: 2 \times \frac{22}{7} \times 140 \\ \implies 2 \times 22 \times 20 \\ \implies \: 880 \\ \sf \: Cost \: Of\: Fencing \: = 880 \times 1 \\ = 880$

Hence, The cost is Rs. 880.

Answer 2

Question :-

The radius of a circular field is 140 m. The cost of fencing its circumference at the rate of₹ 1 per meter is .

Given :-

•Radius of a circular field = 140m

•Cost of fencing 1meter = ₹1

To find :-

Circumference of circular field.

Cost of fencing.

Solution:-

Radius of circular field = 140m

Circumference of circle = 2πr

$\implies\sf 2\times \dfrac{22}{7} \times 140$

$\implies\sf 2\times 22\times 20$

$\implies\sf 880 m$

Therefore, circumference of circular field = 880m

=>

Cost of fencing 1meter = ₹1

Cost of fencing 880 meter = ₹880 × 1

= ₹880

Therefore, cost of fencing = ₹880.