Question

the area of playground is 154m².the rate of fencing per meter is 10rupees then find for 154m²​

Answer 1

Given that area of a circular playground is 22176m

2

.

Area of circle =πr

2

∴πr

2

=22176

⇒r

2

=

(

7

22

)

22176

{∵π=

7

22

}

⇒r=

7056

=84m

∴ Circumference of playground =2πr=2×

7

22

×84=528m

Given that, cost of fencing is Rs.50 per meter.

∴ cost of fencing 528 meter =528×50=Rs.26400

Hence, the correct answer is 26400.