If each side of a cube is decreased by \(19 \%\), then the decrease in surface area is :
Question and options
If each side of a cube is decreased by , then the decrease in surface area is :
Answer and explanation
Correct answer: B - \(34.39 \%\)
Surface area scales by 0.81^2 = 0.6561, a decrease of 34.39%. Surface area varies as the square of the side, so the drop is 1 - 0.6561, not the 19% fall in the side itself.
Practice for these exams
-
JIPMAT
Related question papers
Related exam syllabi
More solved explanations in Arithmetic
- What annual installment will discharge a debt of ₹ 4600 due in 4 years at 10% simple interest?
- The Bubna dam has four inlets. Through the first three inlets, the dam can be filled in 12 minutes; through the second, the third and the fourth inlet, it can be…
- The height of the cylinder of maximum volume that can be inscribed in a sphere of radius 'a' is -
- Train A of length 120 meter is running at a speed of 60 km/h. Train B of length 150 meter, running in the same direction, crosses train A in 64.8 sec. What is the…
- If abc > 0, where a, b and c are integers, which of the following must be true?