If three painters can complete three rooms in three hours, how many painters would it take to do 27 rooms in 9 hours?	Choose the correct choice from the following answers
A) 10	B) 8	C) 7	D) 9	E) 11

Rationale: explanation : three painters can complete three rooms in three hours . so 27 rooms can be painted in 9 hrs by 9 painters answer : d ) 9 painters
Answer: D