Question 81407
the length of the shadow is proportional to the height of the pole ... the ratio of pole to shadow is constant regardless of pole height ... a pole twice as high will cast a shadow twice as long, etc.


this means that 4 is to 34 as 20 is to x ...{{{4/34=20/x}}} ... cross multiplying gives 4x=20*34


4x=680 so x=170