Question

A gardener wants to fence a circular garden of diameter 21 m. find the length of 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 meter .

Answer 1

Answer:

21×2+4= 42+4=46 so 46 is the answer

Answer 2

Answer:

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

I hope it helps you

#SILENT GIRL ANSWER