Question

Each edge of cube is increased by 50%.The percent of increase in the surface of cube

Answer 1

Answer:

Answer: A) 125%

Explanation:

Let the edge = a cm

So increase by 50 % = a + a/2 = 3a/2

Total surface Area of original cube = 6a2

TSA of new cube = 6(3a2)2 =6(9a24)= 13.5a2

Increase in area = 13.5a2−6a2 =7.5a2

7.5a2 Increase % =7.5a26a2×100 = 125%