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The diameter of a circular field is $56\ m$. Find the circumference and hence find the cost of fencing it at the rate of $80\ per\ m$.
Given: The diameter of a circular field is $56\ m$. And the rate of fencing $80\ per\ m$.
To do: To find the circumference and to find the cost fencing.
Solution:
As given the diameter of a circular field $=56\ m$
Therefore, radius of the circular field$=\frac{56}{2}=28\ m$
Circumference of the circular field$=2\pi r$
$=2\times\frac{22}{7}\times28$
$=176\ m$
As given, rate of fencing$=80\ per\ m$.
Therefore, total cost of fencing$=176\times80$
$=₹\ 14080$
Thus, the cost of fencing the circular field is $₹\ 14080$.
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