The perimeter of a rectangular box is 42cm. The length is 13cm. Finds its area.
Solution
Correct Answer: Option B
Perimeter = 2(a+b)=42
=> 2a + 2b = 42
=> 2X13 + 2b = 42
=> 2b = 16
=> b = 8
aXb = 13X8 = 104 cm2
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