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Question:
A15
B20
C10
D50
Answer:
2(l+b)=60 ⇒ (l+b)=30 .........(1) lb =200 (l-b)² = (l+b)² -4lb =30² - 4 × 200 =100 l-b = 10 ..........(2) (1) & (2) ⇒ l =20 , b= 10
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