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. 60cm2
- B. 45cm2
- C. 30cm2
- D. 15cm2
Correct Answer: A. 60cm2
Explanation
New are = (2 x 15) x (2 x x) = 60cm2
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