[General] A writing form question.

[jiaruchan]

I have seen people write 'a twenty-minute walk', which is deemed correct.

Then, if it is a 25-minute walk, people tend to write it as ' a twenty-five minute walk' rather than 'a twenty-five-minute walk'.

My question is:

Which is a more academically acceptable way of the two:

a twenty-five minute walk or a twenty-five-minute walk ?

Thank you.

 

[Barb_D]

Why would you drop the hyphen just because it now has two words?

A twenty-minute walk
A twenty-five-minute walk

In many style manuals, numbers over 10 are written as numerals.

A 20-minute walk.
A 25-minute walk.