Asked by Anonymous
A gardener wants to fence a circular garden of diameter 21m.find the length of the wire he needs to purchase and cost of it at the rate of Rs.4 per meter.
Answers
Answered by
cylinder
Given, Diameter = 21m, cost of the rope = Rs 4 per meter, length of the rope required to fence the garden two round=?, Cost of the rope = ?
The length of rope required = 2 × circumference.
Circumference = 2 π r = π D
= (22/7) × 21 = 66 m
Therefore, length of rope required = circumference × 2 = 66 m × 2 = 132 m
Cost of rope = Rate × length
= 4 × 132 = Rs. 528
The length of rope required = 2 × circumference.
Circumference = 2 π r = π D
= (22/7) × 21 = 66 m
Therefore, length of rope required = circumference × 2 = 66 m × 2 = 132 m
Cost of rope = Rate × length
= 4 × 132 = Rs. 528
Answered by
Reiny
length of wire = circumference = πD
= 21π metres or appr 66 m
cost = 4(21π) = 84π
= 263.89 or appr Rs 264
= 21π metres or appr 66 m
cost = 4(21π) = 84π
= 263.89 or appr Rs 264
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