Question

Austin swam 1.4 laps each minute. Ashley is Austin's older sister. She trains in the same pool and can swim 9 laps in 6 minutes. Is Ashley a faster swimmer than Austin? Question - how can you use the unit rate in minutes per lap to compare Ashley's speed to Austin?

Answer 1

Answer: Asley is faster than Austin.

Explanation:

Given: Austin swam 1.4 laps each minute.

Asley's sister can swim 9 laps in 6 minutes.

i.e. the number of laps she can swim in each minute =
`\frac96 = 1.5`

1.5 > 1.4, i.e. Asley swim more laps than Austin in a minute.

Hence, Asley is faster than Austin.

In mintues per lap, speed of Austin =
`\frac1{1.4}=0.71\text{ minute per lap}`

Speed of Ashley =
`(6)/(9)=0.67\text{ minute per lap}`

Ashley took lesser time then austin per lap.

Hence, Ashley is faster than Austin.