If the length of a rectangle is increased by 40%, and the breadth is decreased by 20%,then the area of the rectangle increases by x%. Then the value of x is:
Answer & explanation
Correct answer: option 4
In this type of question we use this method,
Area increased by = 40 - 20 - \(\frac{(40 × 20)}{100}\)
= 20 - 8 = 12%