Two identical machines have the ability to produce both nuts and bolts. However, it takes 1 second to produce a bolt but 2 seconds to produce a nut. What is the fastest the two machines, working together, can produce 500 nuts and 500 bolts?	Choose the correct choice from the following choices:
A) 250 seconds
B) 500 seconds
C) 750 seconds
D) 2,000 seconds
E) 3,000 seconds
To minimize the amount of time, we should make both machines work all the time while producing 500 nuts and 500 bolts.   Two machines to produce 500 bolts will need   (500*1)/2= 
<gadget id="calculator">  (500*1)/2</gadget>
<output>250</output>
250 seconds.   Two machines to produce 500 nuts will need  (500*2)/2= 
<gadget id="calculator"> (500*2)/2</gadget>
<output>500</output>
500 seconds.   Total= 250+500= 
<gadget id="calculator">250+500</gadget>
<output>750</output>
750.   Answer: 750 seconds
<result>C</result>
Two identical machines have the ability to produce both nuts and bolts. However, it takes 1 second to produce a bolt but 2 seconds to produce a nut. What is the fastest the two machines, working together, can produce 500 nuts and 500 bolts?