find the cost of putting a boundary wall around a rectangular plot 150m long and 79m50cm wide at the rate of Rs.10per m and 2m long stretch is left on one of the longer sides for entrance.

We have,Length of the plot = 150 mbreadth of the plot = 79 m 50 cm = 79.5 mNow, perimeter of the plot = 2length + breadth = 2150+79.5 = 2×229.5 = 459 mNow, length of the stretch left for entrance = 2 mSo, length of the boundary of the plot around which wall is constructed = 459 - 2 = 457 mcost of constructing 1 m boundary wall = Rs 10So, cost of constructing 457 m boundary wall = Rs10×457 = Rs 4570

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rs2295
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Perimeter of rectangular plot = 2(l+b)
= 2( 150 + 79.5 )
= 2 x229.5
=459 m
The cost of 1 m = Rs 10
So, the cost of 459 m = 459 x 10
= Rs 4590
But, 2 m long stretch left.
So, the cost of 2 m = 2 x 10 = Rs 20
The cost of boundary = 4590 - 20
= Rs4570
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