Mathematics, 03.10.2019 06:00 tiannahwlit

Tap 1 fills the pool in 12 hours, while tap 2 fills the same pool in 15 hours. how long does it take to fill this pool if both taps are used?

Answers: 2

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Ok, so what we can do is divide the volume of the pool up into 180 parts.

This is because 12x15=180

So every hour, Tap 1 fills up 15/180 of the pool.

*Note that 12 x 15/180 = 180/180

And every hour, Tap 2 fills up 12/180 of the pool.

*Note that 15 x 12/180 = 180/180

Now 15+12=27

27 fits into 180, 6 and 2/3 times.

Therefore your answer is:

6 hours and 40 mins

Answer from: pr47723

Tap-1 fills 1/12 of the pool each hour.
Tap-2 fills 1/15 of the pool each hour.
Pouring together, they fill (1/12 + 1/15) of the pool each hour.
How much is that ? Can you add those fractions ?

In order to add fractions, they need a common denominator.
The smallest common denominator for 12ths and 15ths is 60ths.

(1/12 + 1/15) = (5/60 + 4/60) = 9/60 pool per hour, together.

The unit rate of 9/60 pool per hour is the same thing as 60/9 hour per pool.

60/9 hour = (6 and 2/3) hours per pool or 6hrs 40minutes

Answer from: Quest

i dony know

step-by-step explanation:

Answer from: Quest

a) one student is chosen from classroom a, then a student is chosen from classroom b.

step-by-step explanation:

independent events are ones in which the probability of one event does not affect the probability of the second event.

one student is chosen from classroom a; this does not affect the chances of choosing a student from classroom b. this makes these independent events.

when one card is chosen from a standard deck and then set aside before a second card is chosen, the probability of the second card being chosen changes. this makes them dependent events.

when one student is chosen from classroom a and then a second student is chosen from classroom a, the probability of choosing the second student changes. this makes them dependent events.

when a letter is chosen from the alphabet and then a second letter is chosen, the probability of choosing the second letter changes. this makes them dependent events.

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Tap 1 fills the pool in 12 hours, while tap 2 fills the same pool in 15 hours. how long does it take...

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