A) 1.5 |
B) 0.5 |
C) 2 |
D) 3 |
D) 3 |
Surface area of a cube = \( 6 X \left(side\right)^{2} \)
Let the side of cube = 'a'
then its surface area = \( 6a^{2} \)
new side of a cube = 2a
then its surface area = \( 6 \left(2a\right)^{2} = 24a^{2} \)
Therefore, Percentage increase = \( \Large \frac{24a^{2}-6a^{2}}{6a^{2}} \times 100 \)
= \( \Large \frac{18a^{2}}{6a^{2}} \times 100 = 300\% \)