30. A bucket is in the form of a frustum of a cone and hold 28.490 lit

1.	30. A bucket is in the form of a frustum of a cone and hold 28.490 litres of water. Theradii of the top and bottom are 28 em and 21 cm respectively. Find the height of thebucket
Answer» Here,The volume = 28.49cmRadius r1 = 28 cmRadius r2 = 21 cm so volume of the frustum =1/3 πh [r1²+r2²+r1 x r2]so...1/3 x 22/7 x h [28²+21²+28x21]28490=5698/3x hh = 15

30. A bucket is in the form of a frustum of a cone and hold 28.490 litres of water. Theradii of the top and bottom are 28 em and 21 cm respectively. Find the height of thebucket

Answer»

Here,The volume = 28.49cmRadius r1 = 28 cmRadius r2 = 21 cm

so volume of the frustum =1/3 πh [r1²+r2²+r1 x r2]so...1/3 x 22/7 x h [28²+21²+28x21]28490=5698/3x hh = 15