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Natali5045456 [20]
3 years ago
10

Three postal workers can sort a stack of mail in 35 ​minutes, 30 ​minutes, and 210 ​minutes, respectively. Find how long it take

s them to sort the mail if all three work together.
The time it takes for all three to complete the job is ___ minutes.
Mathematics
2 answers:
Levart [38]3 years ago
6 0

Answer:

92 minutes

Step-by-step explanation:

Find the average of the numbers by adding them all together, then dividing the sum by three.

Tema [17]3 years ago
3 0

Answer:

The time it takes for all three of them to complete the job is 15 minutes.

Step-by-step explanation:

Three postal workers can sort a stack of mail in 35 minutes, 30 minutes and 210 minutes respectively .

The rate for each person to stack a mail can be represented as

rate1 = 1/35

rate2 = 1/30

rate3 = 1/210

let t = time in minutes

1/35 + 1/30 + 1/210 = 1/t

find the common factor of the denominator

(6 + 7 + 1)/210

14/210 = 1/t

cross multiply

14t = 210

divide both sides by 14

t = 210/14

t = 15

The time it takes for all three of them to complete the job is 15 minutes.

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3 years ago
Lorene plans to make several open-topped boxes in which to carry plants. She makes the boxes from rectangular sheets of cardboar
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Answer:

29 feet in length, 5 feet in width and 12 feet in height

Step-by-step explanation:

We have that for the volume of a quadrangular prism is:

V = l * w * h

Ie length times width times height

In this case, the height is determined by the squares that you put in each corner, taking into account that a square has all the same sides, the height is 12 inches. h = 12

they tell us that the length is 24 inches more than the width, that is, l = 24 + w

replacing we have:

1740 = (24 + w) * w * 12

1740 = 12 * w ^ 2 + 288 * w

12 * w ^ 2 + 288 * w - 1740 = 0

if we calculate the root, we have w = 5 or w = -29

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Thus:

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which means that the dimensions are:

29 feet in length, 5 feet in width and 12 feet in height

5 0
3 years ago
Plz help me cant understand
Pachacha [2.7K]
I hope this helps you

7 0
3 years ago
A bread recipe calls for 5 1/2 cups of white flour and 1 1/4 cups of rye flour. How much more of white flour than rye flour is n
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white= 22/4

rye= 11/4

22-11=11

11/4= 2 3/4 more cups of white flour then rye

6 0
4 years ago
Read 2 more answers
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