Question

If the cost of lying concerete in a circular field at rupees 7 per sq m is rupees 9702 find the cost of cementing the barricade at rupees 5 per meter

Answer 1

Answer:

Step-by-step explanation:

Cost of lying concrete = Rs. 7/sq

Total cost = Rs. 9702

Now,

Cost per sq m*Area of circle = total cost

7*Area of circle = 9702

Area of circle = 9702/7

Area of circle = 1386 sq m

again,

Area of circle = 1368

πr2 = 1368

22/7*r2 = 1368

r2 = 1368*7/22

r2 = 441

r = √441

r = 21 cm

Perimeter of circle = 2πr

= 2*22/7*21

= 2*22*3

= 132 m

Then,

cost of barricading = Rs. 5/m

Total cost = 132*5 = Rs. 660/-

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