If the length of a rectangle is increased by 12% and the breadth is decreased by 8%, the net effect on the area is:
Answer & explanation
Correct answer: option 1
12% = \(\frac{3}{25}\) & 8% = \(\frac{2}{25}\)
Old : New
Length 25 : 28
Breadth 25 : 23
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Area 625 : 644
Net change in area = \(\frac{644 - 625 }{625}\) × 100
= \(\frac{19 }{625}\) × 100
= 3.04%
Ans :- increase by 3.04%