TS ICET 24 May 2019 Shift 1 Paper

Question : 90 of 200

Marks: +1, -0

If the length of a rectangle is increased by 15% and the breadth decreased by 10% then the percentage change in its area is:

Solution:

Original area = ℓb
New area

= (1.15 ℓb) × (0.9 b) = 1.035 ℓb

∴ Required increase in area

={0.035ℓb}/{ℓb}×100

=3.5%

increase

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