Question

If the side of a square is increased by 30%, then the area is increased by

• A. $9\%$
• B. $27\%$
• C. $30\%$
• D. $69\%$

Answer 1

Answer: (D)

$69\%$

Let the side $=10cm$

New side = $(10\times \frac{130}{100})=13$ $cm$

Original area $=10\times 10=100c{m}^2$

New area $=13\times 13=169c{m}^2$

Increase in area $=69\%$

Hence, option D is correct.