SOLUTION: A field is the form of a circle. The cost of ploughing the field at Rs. 1.50 per m^2 is Rs.5775. The cost of fencing the field at Rs.8.50 per metre is.

Algebra ->  Surface-area -> SOLUTION: A field is the form of a circle. The cost of ploughing the field at Rs. 1.50 per m^2 is Rs.5775. The cost of fencing the field at Rs.8.50 per metre is.      Log On


   

Question 628556: A field is the form of a circle. The cost of ploughing the field at Rs. 1.50 per m^2 is Rs.5775. The cost of fencing the field at Rs.8.50 per metre is.
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi, Re TY, note typo

A field is the form of a circle.  A+=+pi%2Ar%5E2

The cost of ploughing the field at Rs. 1.50 per m^2 is Rs.5775. 

 $1.50· A(in m^2) = Rs.5775 or  A+=+5775%2F1.5

A+=+5775%2F1.5=pi%2Ar%5E2+ and r  = sqrt%28highlight%283850%29%2Fpi%29   

 C = 2pi*r = 2pi%2Asqrt%283850%2Fpi%29 

cost of fencing the field at Rs.8.50 per metre = 8.50· C = 8.50·2pi%2Asqrt%283850%2Fpi%29 

Using Calculator:  Using the keyboard pi or  pi+=+3.1416 

 8.50·2pi%2Asqrt%283850%2Fpi%29= 8.50%2A+2pi%2A35+=+1870+Rounded to nearest whole number.