Question

A Gardener wants to fence a circular garden of diameter 21m.Find the length of the rope he needs to purchase,if he makes 2 rounds of fence.Also find the cost of the rope ,if it costs ₹4 per metre.(Take π 22/7)
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Answer 1

circumference of garden= 21×22/7

66×2

132

cost of the rope =132×4= Rs.528

Answer 2

Answer:

Diameter of the circular garden = 21 m

∴ Radius = 21 / 2 m

∴ Circumference = 2πr = 2×22 / 7×21 / 2

= 66 m

Length of rope needed for 2 rounds

= 2 × 66 m = 132 m

Cost of the rope = ₹4 × 132 = ₹ 528

Step-by-step explanation:

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