Three blondes were at University (don't ask how, this is just a joke!) and were given the task of measuring the height of the flagpole in the 'Quad'.
Out they went with a surveyor's tape measure, ladders, rope, etc., but couldn't manage the problem (they fell off the ladders, they couldn't get the tape up etc.,)
A passing engineering student watches all this then comes over and removes the top pin from the pole support, and lowers the flagpole to the ground. He quickly measures it using the tape, and re-erects the flagpole, handing the measurement to one of the blondes.
She turns to her friends and says:



"Typical engineer, we need the height, he measures the length!"

Nigel