If each edge of a cube is increased by 50% then percentage increase in its surface area is.?
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125%
Step-by-step explanation:
current surface area = 6a^2
after increasing each edge by 50% new surface area would be = 6 (1.5a)^2
= 13.5 a^2
the total increase in surface area = (13.5-6)a^2
= 7.5a^2
that is 125% (=6×1.25) of initial area
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