Question

The water level in a burette is 30cm3 if 55 drops of water fall from the burette and the average volume of one drop is 0.12cm3 what is the final water level in the burette ?

Answer 1

The final water level in the burette is
`23.4\ cm^3`

Explanation:

It is given the water level in a burette is
`30\ cm^3`. The burette loses 55 drops, each one with an average volume of
`0.12\ cm^3`.

If each drop has a volume of
`0.12 cm^3`, then 55 drops have a volume of
`55*0.12\ cm^3=6.6\ cm^3`

The new level of water in the burette is the subtraction of the original contents minus the volume loss.

New volume =
`30\ cm^3-6.6\ cm^3`

New volume =
`23.4\ cm^3`

The final water level in the burette is 23.4\ cm^3