One computer can upload 100 megabytes worth of data in 5 seconds. Two computers, including this one, working together, can upload 1300 megabytes worth of data in 40 seconds. How long would it take for the second computer, working on its own, to upload 100 megabytes of data?
Choose the correct choice from the following.
A) 6	B) 8	C) 9	D) 11	E) 13
Since the first computer can upload 100 megabytes worth of data in 5 seconds then in   5*8= 
<gadget id="calculator">  5*8</gadget>
<output>40</output>
40 seconds it can upload   8*100= 
<gadget id="calculator">  8*100</gadget>
<output>800</output>
800 megabytes worth of data, hence the second computer in 40 seconds uploads   1300-800= 
<gadget id="calculator">  1300-800</gadget>
<output>500</output>
500 megabytes worth of data. The second computer can upload 100 megabytes of data in 8 seconds.   Answer: 8.
<result>B</result>
One computer can upload 100 megabytes worth of data in 5 seconds. Two computers, including this one, working together, can upload 1300 megabytes worth of data in 40 seconds. How long would it take for the second computer, working on its own, to upload 100 megabytes of data?