Answer is 6 meters.
As a person with height of 1.5 meters casts a shadow of 8 meters which 5.3333... times greater than the real height, using this relation we can find the real height by dividing the length of shadow by 5.3333...
So the height of pole is:
32/5.33333 = 6 meters
Assuming he spends all the $24 on renting DVD's we can simply divide the money he has available with the price of each DVD in order to know how many he can buy.
