Answers

2016-01-15T08:49:02+05:30
Increase by 50 % = a+a/2 = 3a/2
Surface Area of original cube = 6a² = 6x(3a/2)² = 13.5 a² 
Increase in area = (13.5 - 7)a² =7.5 a²
Increase % = 7.5 a²/6a² x 100 = 125%
2 5 2
2016-01-15T10:01:41+05:30
Let the edge = a cm So increase by 50 % =  = Total surface Area of original cube = TSA of new cube = ==  Increase in area =  =  Increase % = = 125%
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Let the edge = a cm 
So increase by 50 % =  = 
Total surface Area of original cube = 
TSA of new cube = 
==  
Increase in area =  =
  Increase % = = 125%