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herchellann302
14.07.2019 •
Mathematics
Two water pumps are used to drain a swimming pool pump a can drain the pool in 45 minutes in pump be can dream the same pool in 35 minutes how many minutes will it take to drain the pool using both pumps at the same time
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Ответ:
We're looking for the amount of time involved. We know the pumping rates.
First, a look at the units of measurement:
1 job
rate#1 + rate#2 (both in job / time)
When this is simplified, "job" disappears (is cancelled) and time appears in the numerator of the result.
Now, using the actual numbers given:
1 job
1 job 1 job
+ = 0.0508 job/min
45 min 35 min
Finally, divide "1 job) in the first numerator by this 0.0508 job/min. The result, 19.69, indicates the number of minutes required for both pumps to drain the pool.
Ответ:
true
Step-by-step explanation: