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Tasya [4]
3 years ago
13

elise takes 12 minutes to rake up and bag a pile of leaves her sister katherine takes twice as long, how many minutes would it t

ake both of them working together to complete 10 bags of leaves?​
Mathematics
1 answer:
Ymorist [56]3 years ago
8 0

Answer:

80 minutes

Step-by-step explanation:

Rate and Time are inverses of each other

First,

Elise Time = 12

and

Katherine Time = 2 * 12 = 24

Their rates would be (inverses):

Elise Rate = 1/12

Katherine Rate = 1/24

Together their rate is 1/12 + 1/24 = 3/24

Now, the inverse of this rate would be the time it takes to complete 1 bag together, that is:

(3/24) ^ -1 = 24/3 = 8 minutes

So, 10 bags would take them:

8 * 10 = 80 minutes

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Set up a ratio:

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Cross multiply:

240 * 36 = 180x

8640 = 180x

Divide both sides by 180:

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The person would weigh 48 pounds.

7 0
3 years ago
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Answer:

Least number of bus require for trip = 5 buses (Approx)

Step-by-step explanation:

Given:

Total number of classes = 9

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Find:

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Total people = 225 + 8 + 4

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6 0
3 years ago
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atroni [7]

Answer:

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Step-by-step explanation:

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Hope it helps.

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To answer this problem, one way is to use the calculator and add directly the two numbers and get the average between the two. The answer is 25/77. We can also get this number by getting the LCM of the denominators which is 77. 2/7 is equal to 22/77 while 4/11 is equal to 28/77. 0.5*(22 +28) is equal to 25. Hence the answer is 25/77. 
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Answer:

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