Question

a rectangular plot 200m ×150m has three 3 m 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. a. find the area covered by the shop . b... also, find the cost of reconstructing the roads at the rate of rs 225 per m 2.

Answer 1

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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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Answer 2

Answer:

Step-by-step explanation:

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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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