24 hours working day

[Rachel Adams]

Hello.

Is "I have 24 hours working day" correct? Should I use "a -24-hour-long working day"?

 

[SoothingDave]

Yes, or "a 24-hour working day." The singular is used when a measurement is used as an adjective. It is a 6-inch sub, not a 6 inches sub. A ten-foot pole, not a ten-feet pole.

 

[Rachel Adams]

Yes, or "a 24-hour working day." The singular is used when a measurement is used as an adjective. It is a 6-inch sub, not a 6 inches sub. A ten-foot pole, not a ten-feet pole.

In the same way "a two-hour long lesson." Right?

 

[Rover_KE]

Right – or just 'a two-hour lesson'.

 

[Rachel Adams]

Right – or just 'a two-hour lesson'.

But "an hour long lesson" isn't written with a hyphen, is it?

 

[GoesStation]

In the same way "a two-hour long lesson." Right?

Yes, except that you need one more hyphen in the compound adjective.