SOLUTION: The perimeter of a rectangle is 42 cm. If the length is trebled and 7cm is added to 4 times the width, the perimeter of the new rectangle is 154 cm. Find the length of the original
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Question 1012979: The perimeter of a rectangle is 42 cm. If the length is trebled and 7cm is added to 4 times the width, the perimeter of the new rectangle is 154 cm. Find the length of the original rectangle.
Answer by macston(5194) (Show Source): You can put this solution on YOUR website!
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L=original length; W=original width;P=original perimeter
P2=perimeter of new rectangle
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Use this to substitute below.
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Substitute for L from above.
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ANSWER 1: The original width was 7 cm.
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=
ANSWER 2: The original length was 14 cm.
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CHECK:
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