1. a semicircular grassy plot is attached to a rectangular plot of 40 metres and 28 metres long by its width. find cost of fencing the combined plot at Rs 1.25 per metre

guys please its urgent ............ experts please .........

Length of the plot, l = 40 m

Width of the plot, b = 28 m

Let the radius of the semicircular grassy plot be r m.

∴ 2r = BC = 28 m

r = 14 m

Combined length of the plot

= AB + AD + CD + Length of  arc CB

= l + b + l + πr

= 2l + b + πr

= 80 m + 28 m + 44 m

= 152 m

Given, cost of fencing the plot = Rs 1.25 / m

∴ Cost of fencing the combined plot

= Combined length of the plot × Cost of fencing the plot

= 152 m × Rs 1.25/m

= Rs 190

Thus, the cost of fencing the combined plot is Rs 190.

 

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