Question

the radius of a circular plot is 7.7 metres . how much will it cost to fence the plot with 3 rounds of wire at the rate of 50 rupees per metres ​

Answer 1

Step-by-step explanation:

Given :

r = 7.7 m

No of Rounds = 3 ( by its circumference)

Circumference = 2 x 22/7 x r

According to the question,

length of wire in 3 rounds is = 3 x ( 2 x 22/7 x r )

=> 3 X ( 2 X 22/7 X 1.1)

=> 3 X (2 X 22 X 1.1)

=> 3 X ( 2 X 24.2)

=> 3 X 48.4

= 145.2 m

Now the Cost of fencing per meter = Rs. 50

Total cost required = ( length of wire) x ( cost of fencing per meter )

=>Rs { (145.2) X ( Rs. 50) }

= Rs. 7,260

Hence the required Cost of fencing the circular field is

Rs. 7260