Question

Two computers each produced 43,000 public utilities bills in a day. One computer printed bills at the rate of 8,600 an hour and the other at the rate of 7,800 an hour. When the first computer finished its run, how many bills did the other computer still have to print?

Answer 1

Based on the rate at which the computers are printing bills, the number of bills that the second computer was still to print was 4,000 bills.

How long did the first computer take to finish?

= Number of bills / Bills per hour

= 43,000 / 8,600

= 5 hours

How many bills was the second computer left with?

This can be found by the formula:

= Number of bills to print - Bills printed in 5 hours

= Number of bills to print - ( Bills printed per hour x Number of hours)

Solving gives:

= 43,000 - (7,800 x 5)

= 4,000 bills

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