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seropon [69]
3 years ago
13

If john can drink one barrel of water in 6 days, and mary can drink one barrel of water in 12 days, how long would it take them

to drink one barrel of water together?
Mathematics
1 answer:
krek1111 [17]3 years ago
6 0
Hello,

A good first step to take would be to calculate how much of a barrel John and Mary can drink together in 1 day.


If John can drink 1 barrel in 6 days, then every day he can drink 1/6 of a barrel.
If Mary can drink 1 barrel in 12 days, then every day she can drink 1/12 of a barrel. 

Every day, the total that John and Mary can drink will be (1/6) + (1/12) = (1/4) of a barrel.

If we want to know how many days it will take for them to drink 1 barrel of water together, and they drink 1/4 of a gallon every day, we do 

(1) / (1/4) = 1 * (4/1) = 4 days

It will take 4 days for John and Mary to drink 1 barrel together.

Hope this helps!


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Answer:

Total = 166cm^2

Step-by-step explanation:

Given

See attachment

Required

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Because the bottom part of the upper piece is not visible, the area is calculated as:

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For the bottom piece:

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The correct answer is c.
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