Question

a cylindrical vessel of radius 3.5 cm and height 30 cm is fixed inside a similar cylindrical vessel of radius of 7 cm and height 30 cm the space between the two vessel is filled with cork dust. How many cubic centimeter of cork dust will be required.
Please answer fast.

Answer 1

$= \frac{22(7 \times 7 - 3.5 \times 3.5) \times 30}{7} = 3465cubic \: cm$