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: 40laps

Step-by-step 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.

Answer 2

He swam 1,800 laps total in 12 weeks. Each week, he swam 150 laps because 1800/2=150 in 5 days. Each day, he swam 30 laps because 150/5=30, in 45 minutes. His average time was 30/45=2/3 At that rate, in one hour, he would swim 2/3*60 = 2/3 x 60 = 40 laps/hour Final answer is 40