Multiple choice

What is the percentage increase in the area of the rectangle, if each of its side is increased by 20%?

  1. 40%

  2. 42%

  3. 44%

  4. 46%

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

Let the original length be x and the original breadth be y

Original area = (xy)2

New length = (120/100x)m New breadth = (120/100y)m

New area = (120/100x * 120/100y)m2

= (36/25 m2 )

Increase % area = (11/25xy * 1/xy * 100)% = 44%

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