A rectangular lawn 70 m by 50 m has two roads, each 5 m wide, running – InterviewSolution

1.	A rectangular lawn 70 m by 50 m has two roads, each 5 m wide, running through its middle, one parallel to its length and other parallel to its breadth. Find the cost of constructing the roads at Rs 120 per `m^2`
Answer» Area of the road parallel to the length of the rectangular lawn ` = 705 = 350m^2` Area of the road parallel to the length of the rectangular lawn ` = 505 = 250m^2` There is a common area between these two roads that is a square of `5m` side. `:.` Area of common area between two roads `= 55=25m^2` `:.` Area of both roads ` = 350+250-25 = 575m^2` `:.` Cost of constructing roads at Rs`120` per `m^2 = 575120 = 69000` Rs.

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