A10 foot flagpole casts a 4 foot shadow. at the exact time a 15 foot tree casts a shadow. what is the length of the trees shadow?

I would say that the 15 foot tree would cast a 6 foot shadow. I say this because for every 5 feet of an object, it is two inches of a shadow.

5 foot flagpole - 2 foot shadow
10 foot flagpole - 4 foot shadow
15 foot tree - 6 foot shadow

The question is kind of confusing. if it's asking how many variations of answers can you give. then do 4^5 for your answer.this would be something like the first question could be a and the 2nd c or first b next c etc. if you can, ask the teacher for a better confirmation of what it's asking. if i'm assuming correctly what it's asking, it's 625 different variations.