Question

A gardener wants to fence a circular garden of diameter 14 m. Find the length of the rope he needs to purchase if he makes 3 rounds of fence. Also find the cost of the rope, if it costs Rs 4 per metre.

Answer 1

Diameter of the circular garden (d) = 14 m 

Circumference = π d = \(\frac{22}{7}\) x 14 = 44 m 

Since the rope makes 3 rounds of fence, length of the rope needed = 3 x circumference of the garden 

= 3 x 44 m = 132 m 

Cost of rope per meter = Rs 4 x 132 = Rs 528