1.A rectangular plot 200m*150m has three 3m wide roads along the length of the plot on either side and one in the middle.On either side of the middle road there are shops.Find area covered by the shops and also find the cost of reconstructing the roads at the rate of rs.225 per m2.

Length of plot, a = 200
Breadth of pot, x = 150
Total area of plot = a * x = 200 * 150 = 30000 m2
Now Length of single road , l = length of plot = 200
Breadth of single road , b = 3
Area covered by 3 roads = 3 * l * b = 1800 m2
Now Area covered by shops =  Area covered by plot  - Area covered by 3 roads  = 30000 - 1800 = 28200 m2
Now , rate of constructing roads  = Rs. 225 / m2
Thus total cost of constructing 3 roads = 225 * Area covered by 3 roads = 225 * 1800
= Rs. 405000

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