If side of a cuboid is increased by 50% the its surface area
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Let the edge = a cm
So increase by 50 % = a + a/2 = 3a/2
Total surface Area of original cube = 6a26a2
TSA of new cube = 6(3a2)263a22 =6(9a24)69a24= 13.5a213.5a2
Increase in area = 13.5a2−6a213.5a2-6a2 =7.5a27.5a2
7.5a27.5a2 Increase % =7.5a26a2×1007.5a26a2×100 = 125%
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125%
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