Two plots of land have the same perimeter. One is a square of side 60m, while the other is a rectangle whose breadth is 1.5 dam. Which plot has the greatest area and by how much?
A
Rectangle, 32m2
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B
Rectangle, 36m2
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C
Square, 32m2
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D
Square, 36m2
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Solution
The correct option is DSquare, 36m2 Length of the square =64 m
Length of the rectangle =70 m
Perimeter of the square =4×side=4×64=256 m
Let breadth of the rectangle =B
Perimeter of the rectangle =2(70+B)
Now, according to question,
2×(70+B)=256
⇒140+2B=256
⇒2B=256−140
⇒2B=116
⇒B=58 m
Area of the rectangle =58×70=4060 sq. m
Area of the square = length × breadth =64×64=4096 sq.m