Question 628556
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Hi, Re TY, note typo
A field is the form of a circle.  {{{A = pi*r^2}}}
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 = 5775/1.5}}}
{{{A = 5775/1.5=pi*r^2 }}} and r  = {{{sqrt(highlight(3850)/pi)}}}   
 C = 2pi*r = {{{2pi*sqrt(3850/pi)}}} 
cost of fencing the field at Rs.8.50 per metre = 8.50· C = 8.50·{{{2pi*sqrt(3850/pi)}}} 
Using Calculator:  Using the keyboard {{{pi}}} or  {{{pi = 3.1416}}} 
 8.50·{{{2pi*sqrt(3850/pi)}}}= {{{8.50* 2pi*35 = 1870 }}}Rounded to nearest whole number.