If the diameter of circular field is 84 m, find the cost of fencing around it with four rounds at Rs12per meters?

First, we need to find the circumference of the circular field:

Circumference = π x diameter
Circumference = π x 84
Circumference ≈ 263.893 m

Now, we need to find the total length of fencing required for four rounds around the circular field:

Total length of fencing = 4 x Circumference
Total length of fencing = 4 x 263.893
Total length of fencing ≈ 1055.572 m

Now, we can calculate the cost of fencing at Rs12 per meter:

Cost of fencing = Total length of fencing x Cost per meter
Cost of fencing = 1055.572 x 12
Cost of fencing ≈ Rs12666.864

Therefore, the cost of fencing around the circular field with four rounds at Rs12 per meter is approximately Rs12666.864.

Step 1: Calculate the circumference of the field.

Circumference = πd = (22/7) - 84m = 264m

Step 2: Multiply the circumference by the number of rounds of fencing.

Cost of fencing for 4 rounds = 4 - 264m = 1056m

Step 3: Multiply the length of fencing by the cost per meter.

Cost of fencing = 1056m - Rs. 12/m = Rs. 12,672

Therefore, the cost of fencing around the circular field with four rounds at Rs. 12 per meter is Rs. 12,672.