Length of a side of a square land is 300m.find the length of the wall in metre, reqd. to surround the land. if the width of the wall be 3 decimetres find the area of the land reqd. to build the wall.find the cost of building the wall at the rate of rs 5000/100sq metre.

PLZ EXPLAIN IT.........

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Answers

2014-02-24T15:07:15+05:30
A side of a square land is 300m
then its parameter = 300 x 4 = 1200m

so
the length of the wall in metre, reqd. to surround the land is 1200m.

the land reqd. to build the wall is (300x300)-(300-0.3)^2 = (Ans)

multiply the answer with cost to get the ultimate cost.




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