Question

A faucet fills 1/3 of a water cooler in 1/12 of an hour At this rate how long does it take the faucet to fill the cooler completely

Answer 1

`(1)/(4)\:\mathrm{of\:an\:hour\: or\:}15\:\mathrm{minutes}`

Explanation:

If the faucet fills
`(1)/(3)` of the water cooler in
`(1)/(12)` of an hour, then it will take the faucet
`(1)/((1)/(3))\cdot (1)/(12)=3\cdot(1)/(12)=\fbox{$(1)/(4)$}` of an hour to fill the faucet completely.