the total length of a wire fence around a circular lawn is 660 m, then what is the radius of the garden? What the cost of putting grass in the lawn if the cost of planting grass is 10 per m sqr?
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Step-by-step explanation:
Diameter of the circular garden=21m
∴ Radius of the circular garden=221m
Now, circumference of circular garden=2πr=2×722×221
=22×3=66m
The gardener makes 2 rounds of fence so the total length of the rope of fencing =2×2πr=2×66=132m
Since the cost of 1 meter rope=Rs. 4
Therefore, cost of 132 meter rope=4× 132=Rs. 528.
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