# Time on?

## Recommended Posts

Firstly sorry if this is in the wrong forum and secondly sorry if my question is so simple, it's just that I cannot get my ilogical head around it.

I have an appliance that's on for 3mins and off for 5 mins and what I want to work out (but am having great difficulty doing) is how long the appliance is on for during a 24 hour period.

Thanks

##### Share on other sites

Three fifths of 24.

0.6 * 24 = 14.4 hours

0.4 of an hour = 0.4 * 60 = 24 minutes.

Time on is therefore 14 hours and 24 minutes.

##### Share on other sites

864 minutes

Edited by ash.bekah
##### Share on other sites

Three fifths of 24.

0.6 * 24 = 14.4 hours

0.4 of an hour = 0.4 * 60 = 24 minutes.

Time on is therefore 14 hours and 24 minutes.

A good example for why you check the reasonableness of your work: this can't be right, since it's off longer than it's on, and you have an answer saying the opposite.

On for three and off for five is on 3/8 of the time.

##### Share on other sites

So if I understand the logic behind this, it's the (time on)/(time on + time off)?

So it's basically a simple fraction question and solution?

Thanks.

##### Share on other sites

But only because one day is evenly divisible by the cycle time = (time on + time off). If it were not evenly divisible, you would have had to work out the remainder and figured the amount of time on and off during that last partial cycle.

##### Share on other sites

A good example for why you check the reasonableness of your work: this can't be right, since it's off longer than it's on, and you have an answer saying the opposite.

On for three and off for five is on 3/8 of the time.

Oh my gosh!!! Thank you swansont and sorry everyone else - lol

Edited by TonyMcC

## Create an account

Register a new account