The diameter of a circular field is 56-m- Find the circumference and hence find the cost of fencing it at the rate of 80 per m-

Circumference of circular field #160; =2π R=2× #160; π× 56 2π =56m Cost of fencing #160; =Rs.( 56× 80 ) =Rs.4480 ...

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Standard VII

Mathematics

Circumference of a Circle

The diameter ...

Question

The diameter of a circular field is $\frac{56}{π}$ m. Find the circumference and hence find the cost of fencing it at the rate of $80$ per m.

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Solution

Circumference of circular field $= 2 π R = 2 \times π \times \frac{56}{2 π} = 56 m$
Cost of fencing $= R s . (56 \times 80) = R s .4480$

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The diameter of a circular field is 56πm. Find the circumference and hence find the cost of fencing it at the rate of 80 per m.

Circumference of circular field =2πR=2×π×562π=56mCost of fencing =Rs.(56×80)=Rs.4480

The diameter of a circular field is $\frac{56}{π}$ m. Find the circumference and hence find the cost of fencing it at the rate of $80$ per m.

Circumference of circular field $= 2 π R = 2 \times π \times \frac{56}{2 π} = 56 m$
Cost of fencing $= R s . (56 \times 80) = R s .4480$