Question

9. The diameter of a circular field is 56cm.Find its circumference and
cost of fencing it at the rate of Rs. 80 per metre. (Take =


)
10. Two supplementary angles are in the ratio 2 : 7,find them

Answer 1

Answer:

₹ 14,080

Step-by-step explanation:

It is given that,

Diameter of a circular field = 56 m.

So the radius = 56/2 = 28 m.

We know that,

Circumference of the circle = 2πr

Substituting the values,

=2∗22/7∗28

So we get,

=2∗22∗4

=176 m.

Here the cost of fencing 176 m = 176∗80 = ₹ 14,080.

Answer 2

Answer:

It is given that,

Diameter of a circular field = 56 m.

So the radius = 56/2 = 28 m.

We know that,

Circumference of the circle = 2πr

Substituting the values,

=2∗22/7∗28

So we get,

=2∗22∗4

=176 m.

Here the cost of fencing 176 m = 176∗80 = ₹ 14,080.

Step-by-step explanation:

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