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<em>NOT VALID</em>
Answer:
G
Step-by-step explanation:
the perimeter is the sum of all sides so we have
![P=a^{2} -ab+a-2a+a^2+ab\\\\P=(a^2-2a^2+a^2)+(-ab+2b)+a\\\\P=(0a^2)+(ab)+a\\\\P=ab+a](https://tex.z-dn.net/?f=P%3Da%5E%7B2%7D%20-ab%2Ba-2a%2Ba%5E2%2Bab%5C%5C%5C%5CP%3D%28a%5E2-2a%5E2%2Ba%5E2%29%2B%28-ab%2B2b%29%2Ba%5C%5C%5C%5CP%3D%280a%5E2%29%2B%28ab%29%2Ba%5C%5C%5C%5CP%3Dab%2Ba)
Step-by-step explanation:
- Length of rectangle = 7 less than the twice the breadth
- Perimeter = 40 cm
Let us say the breadth as b and length as l.
→ Length = 7 less than the twice the breadth
→ l = 2b - 7 ...(1)
Now, according to the question,
→ Perimeter of rectangle = 2(l + b)
→ 40 = 2(2b - 7 + b)
→ 40 = 2(3b - 7)
→ 40 = 6b - 14
→ 40 + 14 = 6b
→ 54 = 6b
→ 54 ÷ 6 = b
→ <u>9</u><u> m = Breadth</u>
Now, finding length.
→ l = 2b - 7
→ l = 2(9) - 7 m
→ l = 18 - 7 m
→ <u>Length = 1</u><u>1</u><u> m</u>
I put a step by step on the picture, I thought it would be easier than words. Hope this helps!