Question

A cylindrical tank of diameter 35 cm is full of water. If 11 litres of water is drawn off, the water level in the tank will drop by.

Answer 1

Volume = Pi * r^2 * height

11 litres = 11,000 cm^3

11,000 = Pi * 17.5^2 * height

Height = 11,000/Pi* 17.5^2

Height = 11.4 cm

This is the amount that

the water level will

drop by.

Hope this helps.

:-)

Answer 2

Volume of cylinder

$= \pi {r}^{2} h$

_______________________

$11l = 11000 {cm}^{3}$

$11000 = \pi \times {(17.5)}^{2} \times h$

$h = \frac{11000}{\pi \times {(17.5)}^{2} } \\ \\ = 11.4cm$

_______________________

This is the amount that

the water level will

drop by.