the area of a circular playground is 88704 m sq. find the cost of fencing this ground at the rate of rs 65 per metre...

solve it plzzzz  

Hi!
@   santoshk1968  correctly answered the question.
@   imbaai...  correctly answered the question.
@   Tiger_King_of_merit  correctly answered the question.
 
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  • -2

Area of Cirle = PIe * radius2

88704 = 22/7 * radius2

radius2 = 88704 * 7/22

radius2 = 28224

radius = 168

Circumference of the cirle = 2 * Pie * Radius

C = 2 * 22/7 * 168

C = 1056 m

Cost = Rs 65 per meter

Cost for 1056 m = Rs 68640

Hence the cost of fencing is Rs 68640

  • 0

pie r2 = 88704 m2           by solving it we get 

 r = 168 

then  2pie r = 2 * 22 / 7 * 168

= 1056

  • 0

then cost = 1056 * 65 = 68640 

  • 0

 thanx both of u 

  • -1

 rate is 68640 

  • 0

 Area of Cirle = PIe * radius2

88704 = 22/7 * radius2

radius2 = 88704 * 7/22

radius2 = 28224

radius = 168

Circumference of the cirle = 2 * Pie * Radius

C = 2 * 22/7 * 168

C = 1056 m

Cost = Rs 65 per meter

Cost for 1056 m = Rs 68640

Hence the cost of fencing is Rs 68640

  • 0

 Given , Area of circular playground=88704cm2

Rate of fencing= Rs65/metre

According to question,

Area of circular playground=88704

=> πr2=88704

=> 22/7*r2=88704

=>r2=88704*7/22

=> r2= 4032*7

=>r2 =28224

=>r= 168

Therefore radius of the circle is 168cm

Circumference of the circle= 2πr

=> Circumference=2*22/7*168

=> Circumference=2*22*24

=> Circumference= 1056m

Now, Rate of fencing=Rs65/m

Therefore net cost of fencing= Rate*Circumference= 65*1056= Rs68640

Hence the required Answer---> The Lenght of fencing is 1056m and Cost of fencing it is Rs68640

  • 4
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