Question

The ratio of radii of two cylinders is 3:4 and the ratio of their heights is 4:5 their volume will be in the ratio

Answer 1

Volume of cylinder is =
$2\pi \times r \times h$
The ratio of radii is 3:4
The ratio of heights is 4:5
So substituing the value gives
$\frac{3}{4} \times \frac{4}{5} = \frac{3}{5}$