# Each edge of a cube is increased by 20% then the percentage increase in surface area of the cube is :  Option 1) 39%Option 2) 40%     Option 3) 44%Option 4) 72.8%Option 5) 144%

R rishi raj

Let edge = 100

Surface area = $6\times 100\times 100=60000$

New edge = 120

New Surface area = $6\times 120\times 120=86400$

Increase % = $\left ( \frac{(86400-60000)}{60000} \right )\times 100$

$\Rightarrow$  44%

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