Question

When the side of a square is increased by 50%, then what will be the %  change in the area of the square?

A 110 Correct Answer Incorrect Answer
B 130 Correct Answer Incorrect Answer
C 125 Correct Answer Incorrect Answer
D 120 Correct Answer Incorrect Answer
E none of these Correct Answer Incorrect Answer

Solution

Let the side of a square be=10s  Then old side of the square is =10s x 10s = 100s2 Then, New side of the square will be = 15s x 15s = 225s Therefore, required % change will be = 125 x (100/100) = 125

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