1
Answer: BSet 12: Linear Equations (Advanced)
Explanation
The length of a rectangle is 4 times its width. If the perimeter is 50, what is the length?
What is the length?
A.
10
B.✓ Correct
20
C.
5
D.
25
Detailed Explanation
Choice B is correct. l = 4 w. P = 2(l+w) = 2(4 w+w) = 10 w = 50. w = 5. Length = 4 w = 20.
Key Steps:
•
The correct answer is 20
Why others are wrong:
A: Choice A is incorrect and may result from a calculation error.
C: Choice C is incorrect and may result from a calculation error.
D: Choice D is incorrect and may result from a calculation error.
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