Two Irishmen were standing at the base of a flagpole, looking up.

            
           

A blonde walks by and asked them what they were doing.
           

Paddy replied, 'We're supposed to be finding the height of this flagpole, 
           
but we don't have a ladder.'

The blonde
took out an adjustable spanner from her bag, loosened a few bolts 

            and laid the flagpole down.

She got a tape measure out of her pocket, took a few measurements, and
           
announced that it was 18 feet 6 inches.
           

Then, she walked off.

Mick said to Paddy,
             'Isn't that just like a blonde!

We need the bloody height, 
             and she gives us the length.