question archive 40 laps per hour
40 laps per hour
Subject:MathPrice: Bought3
40 laps per hour.
Always read a word problem and focus on what is asked. Secondly read back and consider the info given to calculate the requested answer. We are asked for average rate of laps swam per hour. We must find his total laps, and his total time of swimming. The number of laps are given directly to us, 1800.
The total time will have to be calculated in hours. It is useful to convert the minutes of a day's practice into the unit of hours, since that is the unit requested in the answer.
We see that he swam 45 minutes for 5 days in each of 12 weeks. Express the minutes as ##45/60## or ##3/4## hours or 0.75 hours
So total time is ## 0.75 * 5 * 12 = 45## hours So our average is: ##1800/45 =40## laps per hour of swimming
