45 workers work 8 hours to dig a hole 30 meters deep. How many extra workers should be hired to dig another hole 55 meters deep by working for 6 hours?  Choose the most appropriate option:
A) 50	B) 55	C) 60	D) 65	E) 70

Rationale: "45 workers * 8 hours / 30 meters = x * 6 / 55 x = 110 total workers 110 - 45 = 65 new workers the answer is d ."
Answer: D