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
45 workers * 8 hours / 30 meters = x * 6 / 55   x = 110 total workers     110 - 45= 
<gadget id="calculator">  110 - 45</gadget>
<output>65</output>
65 new workers   The answer is 65.
<result>D</result>
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?