A rectangular lawn of dimensions 82 m and 60 m has two roads each 10 m wide running in the middle of...........

Quantitative Aptitude (CDS) Mensuration 2D

A rectangular lawn of dimensions 82 m and 60 m has two roads each 10 m wide running in the middle of the lawn, one parallel to the length and the other parallel to the breadth. What is the cost of making the two roads at Rs.3 per sq m?

Rs. 473.33

Rs. 300

Rs. 400.5

Rs. 500

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Explanation:

area of rectangular lawn is=82× 60
=4920 square m
area of two roads=roads parallel to length +roads parallel to breadth
=82× 10+60× 10
=820+600
=1420 m^2
cost=1420/3
=473.33