Practicing Success
The radius and height of a solid cylinder is increased by 20% and 16\(\frac{2}{3}\)% respectively . What is the percentage change in its volume? |
No Change 46% 36% 68 % |
68 % |
Old : New radius: 5 : 6 height : 6 : 7 Volume: 52×6 : 62×7 25 : 42 (*Inc. by 17) Increase % = \(\frac{17}{25}\)×100 = 68% OR Volume of cylinder = \(\pi \)r2h .... (i) New volume = \(\pi \) (\(\frac{6}{5}\)r)2 × (\(\frac{7}{6}\)h) = \(\frac{42}{25}\) \(\pi \)r2h = 68% increase |