Agree, too, grammar is not good- making it very difficult to understand the question let alone try to answer this ;-) Where is this quiz from, please?
Hugs, Bea :-)
I think needhu's gone to work, or back to bed;)
It might make sense if you said, "If the pillar is now 15 feet tall, how long is the shadow?"
In that case the ratio of pillar height to shadow length would be the same. If x is the shadow length
i.e. 6/2 = 3.
Then 15/x = 3
So 15/3 = x = 5 feet.
Does that answer the question?