Algebrahard · Past Paper
The area of a rectangle remains same if length is increased by 7 and breadth decreased by 3, or length decreased by 7 and breadth increased by 5. Find length.
A28
B21
C35
D14
✓ Correct Answer: A — 28
(L+7)(B-3)=LB -> -3L+7B=21. (L-7)(B+5)=LB -> 5L-7B=35. Adding gives 2L=56 -> L=28.
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