Question

Sebastian swam laps every day in the community swimming pool. he swam 45 minutes each day, 5 days a week, for 12 weeks. in that time, he swam 1,800 laps. what was his average rate in laps per hour?

Answer 1

Answer: 40 laps per hour

Step-by-step explanation:

1. If she swam for 5 days in 12 weeks, she swam 60 days in 12 weeks and then multiply 60 by 45 because she swam 45 minutes EACH of the 60 days which is 2700 minutes.

2. Since it wants us to find the average rate in laps per hour, 60 minutes = 1 hour and 2700 minutes/60 = 45 hours so she swam a total of 45 hours in 2700 minutes/12 weeks.

3. And to find the unit rate of laps per hour, divide 1,800 by 45 which results into 40.

Therefore, Sebastian swam 40 laps per hour

Answer 2

Answer: 40laps

Explanation:

Sebastian swam 45minutes per day.

If she swam 5days a week, this is equivalent to Sebastian swimming 60days in 12weeks.

If Sebastian swam 45minutes in a day, she must have swam for (45×60)minutes in 60days which is equivalent to 2700minutes

Converting 2700minutes to hours;

60minutes = 1hour

2700minutes = x

x = 2700/60

x = 45hours

Since sebastian swam 1800laps in that 12weeks in 45hours, her average rate lap per hour can be calculated thus;

1800laps = 45hours

X laps = 1hour

30 × X = 1800

X = 1800/45

X = 40laps

This shows that Sebastian swam 40laps in one hour in average.