Question

A teacher collects 18 pints of lake water for a lab she is teaching. The lab requires each student to use 4 fluid ounces of lake water. If 68 students are participating, how many pints of lake water will the teacher have left over?

Answer 1

Multiuply 4 fluid ounces by 68, convert the answer into pints and subtract.

Explanation:

Calcuating the number of fluid ounces used
If each student uses 4 fluid ounces and there are 68 students we can get the total amount of fluid ounces used by multiplying 4 by 68.

`4**68 = 272`

So we know 272 fluid ounces in total are used.

Converting to pints
We know there are 20 fluid ounces in a pint, so to convert 272 fluid ounces to pints we simply divide by 20

`272/20 = 13.6`

So the students use 13.6 pints in total

The Final Answer
We can now simply take 13.6 pints away from our original of 18 pints to figure out how many pints the teacher will have left over.

`18-13.6 = 4.4` pints left over