Question

please help me as fast as possible
10. Each edge of a cube is increased by 50%. Find the percentage increase in the surface
area of the cube.​

Answer 1

Answer:

125%

Step-by-step explanation:

let edge of cube be a

then, surface area = 6a²

if each edge is increased by 50%

then,edge of cube = a×50/100=a/2+a = 3a/2

surface area=6×(3a/2)²= 6×9a²/4 = 27a²/2

increase = 27a²/2-6a² = 27a²-12a²/2 = 15a²/2

percentage= 15a²/12a²×100 = 5×25 =125%(ans)