Question

41. A rectangular park with length 120m and width 80 m has two roads of width 2 mare
running at right angles to each other along its length and breadth. Find the area of the
roads and the cost of laying bricks on the road if the charges are Rs 6 per m​

Answer 1

Step-by-step explanation:

The cost of gravelling them at Rs. 1.20 per square meter = Rs . 1560

To find the area of roads :

It is given that 

a rectangular lawn 80 m × 60 m has two roads each 10 m wide running in the middle of it.

Dimension of two roads are 80×10 and 60×10

Area of two roads = 80×10+60×10−10×10

=800+600−100

= 1300 sq. meter

To find the cost for gravelling 

It is given that

The cost of gravelling the at Rs. 1.20 per sq. meter.

Therefore total cost = total area × cost per sq. meter

=1300×1.20

=Rs.1560

∴ The cost of gravelling them at Rs. 1.20 per sq. meter = Rs. 1560

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