Question

0.33 A gardener wants to fence a circular garden of diameter 21 m. Find the length of the rope he
needs to purchase, if he makes two rounds of fence. Also find the cost of the rope, if it cost Rs.4
per meter. (Take 1 = 72)​

Answer 1

Answer: Length of the rope he needs to purchase is 132m and the cost of the rope will be ₹528.

Step-by-step explanation:

Answer 2

Answer:

$\fbox \pink{diameter} = 21m \\ \\ \fbox \purple{radius} = \frac{21}{2}m \\ \\ \fbox \red{circumference} = 2\pi \: r \\ \\ 2 \times \frac{22}{7} \times \frac{21}{2} = \frac{22}{7} \times 21 \\ \\ 22 \times 3 = 66m \\ \\ \fbox \green{length \: of \: rope \: required} = 2 \times 66 = 132m \\ \\ \fbox \blue{cost} = 1m \: rope = 4 \\ \\ 132m \: rope = 4 \times 132 = 528$