What is the sum of 5 feet 9 inches and 12 feet 3 inches?

1 answer:

7 0

<span>So we want to know what is the sum of 5 feet 9 inches and 12 feet 3 inches. To know that we need to know that there are 12 inches in one foot. Now we add feet with feet and inches with inches: 5 + 12 feet 9 inches + 3 inches = 17 feet 12 inches = 18 feet 0 inches or just 18 feet.</span>

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One pipe can fill a pool in 9 hours. Another pipe can fill the pool in 6 hours. How long would it take them to fill the pool if

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Answer:

3.6 hours or 3 hours and 36 minutes.

Step-by-step explanation:

If the first pipe can fill the pool in 9 hours that means that in 1 hour it fills $\frac{1}{9}$ of the pool, we use the same logic for the second pipe and conclude that in 1 hour it feels up $\frac{1}{6}$ of the pool. If both were to fill the pool together that means that in 1 hour they would fill...