Multiple choice

If the length of a rectangle is increased by 200% and the breadth is decreased by 40%, then find the change in the area of the rectangle.

  1. 120% increase

  2. 160% increase

  3. 80% decrease

  4. 80% increase

  5. None of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Let the length be l and the breadth be b.

Then, new length = 3 * l and breadth = 0.6 * b

So, area = 1.8 * l * b

So, the increase is 80%.

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