Question

The cost of fencing a circular field at the rate of Rs. 24 per metre is Rs. 5280. The field

ploughed at the rate of Rs. 0.50 per m². Find the cost of ploughing the field.​

Answer 1

Answer:

ANSWER

For Rs.24, then length of fencing =1m

For Rs.52 so, the length of fencing

=

24

1

×5280=220meters

Circumference of the field =220m

2pr=220

Therefore r=

44

220×7

=35m

Area of the field =πr

2

π(35)

2

=1225

Cost of ploughing =Rs.0.50 per m

2

Total cost of ploughing the field =Rs.1225

=

7×2

1225×22×1

=Rs,1925.

Hence, the answer is 1925.

hope it's helpful.

Answer 2

Answer:

₹ 1925

Explanation:

Length of fence = Cost/Rate

• 5280/24
• 220

Length of fence = 220 m which is the circumference.

Circumference of circle = 2πr

• 2 × 22/7 × r = 220
• r = 220 × 7/44
• r = 35

Radius = 35 m

Area of circle = πr²

• 22/7 × 35 × 35
• 22 × 5 × 35

Now,

Cost of ploughing 1 m² = Rs. 0.50

Total cost = 22 × 5 × 35 × 0.50

• 1925

∴ Cost of ploughing the field is ₹ 1925.