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A rectangular board has a length of 15cm and width x cm. If its sides...

Mathematics
WAEC 2019

A rectangular board has a length of 15cm and width x cm. If its sides are doubled, find its new area.

  • A. 60x cm\(^2\)
  • B. 45x cm\(^2\)
  • C. 30x cm\(^2\)
  • D. 15x cm\(^2\)
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Correct Answer: Option A
Explanation

New are = (2 x 15) x (2 x \(x\)) 

= 60cm\(^2\)

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