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Each edge of a cube is increased by 50%. Find the percentage increase in the surface area.

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Each edge of a cube is increased by 50%. Find the percentage increase in the surface area.

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Let the edge of a cube x units 

Its surface area = 6l2 = 6x2 sq. units 

If its edge is increased by 50%, then 

new edge = x + 50% of x

∴ Percentage increase in area

= increase in area/ original area x 100

Where x = increase/decrease

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