the area of a circular field is 17.56 hectares. find the cost of fencing it at the rate of rs. 6 per metre approximately Options
A) 4457
B) 4567
C) 4235
D) 4547
E) 8915
<gadget id="calculator">17.56 / pi</gadget>
<output>17.56/pi = around 5.589522</output>

<gadget id="calculator">(17.56/pi) ** (1/2)</gadget>
<output>4.19046536795139/sqrt(pi) = around 2.364217</output>

<gadget id="calculator">(4.19046536795139/sqrt(pi)) * 100</gadget>
<output>419.046536795139/sqrt(pi) = around 236.421691</output>

<gadget id="calculator">2 * pi * (419.046536795139/sqrt(pi))</gadget>
<output>838.093073590278*sqrt(pi) = around 1_485.481296</output>

<gadget id="calculator">(838.093073590278*sqrt(pi)) * 6</gadget>
<output>5028.55844154167*sqrt(pi) = around 8_912.887774</output>

<result>E</result>
the area of a circular field is 17.56 hectares. find the cost of fencing it at the rate of rs. 6 per metre approximately
multiply(circumface(multiply(sqrt(divide(17.56, const_pi)), const_100)), 6)
"explanation : area = ( 17.56 x 10000 ) m 2 = 175600 m 2 . π r 2 = 175600 ⇔ ( r ) 2 = ( 175600 x ( 7 / 22 ) ) ⇔ r = 236.37 m . circumference = 2 π r = ( 2 x ( 22 / 7 ) x 236.37 ) m = 1485.78 m . cost of fencing = rs . ( 1485.78 x 6 ) = rs . 8915 . answer : option e"