Answer:
2.65 or 3 hours
Explanation:
The bar have sold 207 glasses, but want 61 more glasses to be sold to achieve their number. As we know that they sell 23 per hour, to figure out the number of hours we need to find out 23h=61 where h is the no. of hours. Dividing both sides by 23 gives you 2.65 hours rounded to 2 d.p. If we assume that the answer must be a whole number (which is not stated) then it is rounded up to 3.