Question

A gray whale traveled 152 kilometers in one day. The whale swam between 7 and 8 kilometers each hour. About how many hours did it take the whale to swim its distance? Show two different ways that you can use compatible numbers to get a answer, Them solve

Answer 1

you can use compatible numbers to estimate the time it took the gray whale to swim 152 kilometers at a speed of 7 to 8 kilometers per hour.

Method 1: Using 7 km/h (lower limit):

- Estimate by assuming the whale swam at the lower limit of its speed (7 km/h).

- Time (hours) = Distance (kilometers) / Speed (kilometers per hour)

- Time = 152 km / 7 km/h ≈ 21.71 hours

Method 2: Using 8 km/h (upper limit):

- Estimate by assuming the whale swam at the upper limit of its speed (8 km/h).

- Time (hours) = Distance (kilometers) / Speed (kilometers per hour)

- Time = 152 km / 8 km/h ≈ 19 hours

So, using compatible numbers, it took the gray whale approximately between 19 to 21.71 hours to swim the 152 kilometers.