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 the distance? Show two different ways that you can compatible to find the answer. Then solve.

Answer 1

152/7=21.714 hrs
152/8=19
It took the whale between 19 and 21.7 hours to swim 152 kilometers
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Answer 2

The whale will take approximately 20.27 hours to travel 152 kilometers.

Explanation:

To calculate the hours that the whale take to travel 152 kilometers, we can calculate the hours using both of the speeds and dividing it by the distance, or take an average speed and the divide it by the distance.

The first one is:

`(152)/(7) =21.71 hours\\(152)/(8) =19.00hours`

So the whale will take between 19 and 21.71 hours to travel 152 kilometers.

The second one:

`(8+7)/(2) =7.50\\(152)/(7.50)=20.27hours`

So the whale will take approximately 20.27 hours to travel 152 kilometers.