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Study Stuff for MCA Examinations - NIMCET
Study Stuff for MCA Examinations - NIMCET
Previous Year Question (PYQs)
The percentage change in area of a rectangle by decreasing its length and increasing its
breadth by 5% is
Solution
Assume: Length = 100, Breadth = 100
Original Area = 100 × 100 = 10,000
New length = 95 (5% decrease)
New breadth = 105 (5% increase)
New Area = 95 × 105 = 9975
Change = 9975 – 10000 = –25
Percentage change = (–25 ÷ 10000) × 100 = –0.25%
✅ Area decreases by 0.25%
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