Multiple choice

If the length of a rectangle is decreased by 30% and the breadth is increased by 50%, then find the change in area of the rectangle.

  1. 20% increase

  2. 80% increase

  3. 5% decrease

  4. 5% 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. Original area = l * b Now, new length = 0.7 * l and new breadth = 1.5 * b So, new area = (0.7 * 1.5 * l * b) = 1.05 * l * b Change in area = 5%(increase) Hence, this option is correct.

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