Question

cost of ploughing at the rate of Rs 10 per metre square is Rs 1540 find the radius of the circular field

Answer 1

7 cm is the radius of the field

Answer 2

let the area of the circular field be x metres
cost of ploughing 1 metre= 10rs
x metres area is ploughed in 1540 rs
x=1540/10
x=154 metre squares
area of circle is equal to πrsquare
154=22/7×r×r
r×r=154×7/22
r=√7×7
r=7 metres
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