Answers

2016-03-22T23:36:10+05:30
AREA OF PLAYGROUND = 80*60=4800
Now, According to question cemented pathway outside it 
therefore, LENGTH WILL BE= 80+2+2=84
                 BREADTH WILL BE =60+2+2=64
Now AREA OF PATH INCLUDING PLAYGROUND=84*64=5376
hence area of cemented path only = 5376-4800=576
cost of cementing =576*20=11520
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2016-03-23T08:50:54+05:30
Area of the cemented pathway = (84×64) - (80×60)
= 5376 - 4800
= 576 m²

Cost of cementing per m² = $ 20

Cost of cementing 576 m² = 20 × 576
= $ 11520
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