If the radius of a cylinder is doubled and the height is reduced by 50%, then by how much percent does the volume increase/decrease?
Answer & explanation
Correct answer: option 1
Let the height and the radius = 10
According to the question,
Before After
Radius(doubled) 10 20
10 20
Height(5% reduced) 10 5
--------------------------------
1000 2000 ( 1000) increased)
Percentage increase = 100 × \(\frac{100}{100}\) = 100%