And now, its pathway through the sky;

My strength o’erpowers both iron and steel;

Yet oft I’m left behind the wheel;

I’m made to represent a head;

Am found in every loaf of bread;

Such are the many forms I take,

You can not count all I can make;

Yet, after all, so strange am I,

Soon as you know me, then I die.

267. Henry is four feet high and William is five. The sum of their heights multiplied by five is equal to their father’s age, plus fifteen. How old was their father?