Quantitative Aptitude Ques 918

Question: The length, breadth and height of a cuboid are in the ratio 1: 2: 3. If they are increased by 100%, 200% and 200% respectively, then compared to the original volume the increase in the volume of the cuboid will be

Options:

A) 5 times

B) 18 times

C) 12 times

D) 17 times

Show Answer

Answer:

Correct Answer: D

Solution:

  • Net increase in volume $ =( a+b+c+\frac{ab+bc+ac}{100}+\frac{abc}{100\times 100} ) $ Here, $ a=100, $ $ b=200 $ and $ c=200 $ Net increase $ =( \frac{ \begin{aligned} & 100+200+200+(100\times 200) \\ & ,+(200\times 200)+(100\times 200) \\ \end{aligned}}{100}+\frac{100\times 200\times 200}{100\times 100} ) $ = 500 + 800 + 400 = 1700% Now, $ 1700\times \frac{1}{100}=17times $ Hence, volume of cuboid increases by 17 times.