If each side of a dice becomes four times , then the percentage change in the surface area is:
Answer & explanation
Correct answer: option 4
Surface area of cube = 6a2
After becoming four times each side of the cube
new surface area = 6 (4a)2
= 16 (6a2)
= 16 (actual surface area)
Surface area ⇒ Old : New = 1 : 16
Increased percentage = \(\frac{15}{1}\) × 100 = 1500%