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seconds into minutes

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by jcnissi » Sun Jun 13, 2010 8:33 pm
A certain computer file contains 8,000 data records, each of which needs to be updated. If it takes 20 seconds to update 100 records, then at the same rate, approx. how many minutes will it take to update all of the records in the file?
a. 16
b. 27
c. 67
d. 80
e. 160

Please show me how you get the answer.
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Source: — Problem Solving |

by Rahul@gurome » Sun Jun 13, 2010 8:57 pm
100 records are updated in 20 seconds.
So 8,000 records are updated in (20/100)*8000 = 1600 seconds.
In minutes this is 1600/60 = 26 2/3 minutes which is approximately 27 minutes.

The correct answer is (b).
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