3 pumps, working 8 hours a day, can empty a tank in 2 days. How many hours a day must 8 pumps work to empty the tank in 1 day?
Options
A) 6	B) 10	C) 11	D) 12	E) 13
3 pumps take 16 hrs total (8 Hrs a day)   If 1 pump will be working then, it will need   16*3= 
<gadget id="calculator">  16*3</gadget>
<output>48</output>
48 hrs   1 pump need 48 Hrs   If I contribute 8 pumps then     48/8= 
<gadget id="calculator">  48/8</gadget>
<output>6</output>
6 hrs.   answer :6
<result>A</result>
3 pumps, working 8 hours a day, can empty a tank in 2 days. How many hours a day must 8 pumps work to empty the tank in 1 day?