Explanation:
typically speeds are measured in meters/second, kilometers/hour and such.
I guess, we need to go for "per hour" here.
Logan swam 750 meters in 1/3 hour.
what do we need to do to bring that ratio to a fraction that bases on 1 hour instead of 1/3 hour ?
right, we need to multiply to and bottom by 3.
750×3 / 1×3/3 meters/hour = 2250 / 1 meters/hour =
= 2250 meters/hour = 2.25 km/h
(by using 1000 meters = 1 kilometer).
so, logan's average swimming speed was 2.25 km/h
Mila swam 2/3 × 750 meters in 1/4 hour.
that is
2×750 / 3 meters in 1/4 hour.
1500 / 3 in 1/4 hour = 500 meters in 1/4 hour.
what do we need to do to bring this ratio to a fraction based on 1 hour ?
we need to multiply top and bottom by 4.
500×4 / 1×4/4 meters/hour = 2000 meters/hour = 2 km/h
Mila's average swimming speed was 2 km/h.
Logan was a little bit faster : 2.25 vs. 2 km/h