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daser333 [38]
2 years ago
7

If it took eight men ten hours to build a wall, how many hours would it take four men to build it?

Mathematics
2 answers:
olga nikolaevna [1]2 years ago
8 0
8 men= 10hours
Now,
4men= ? hours

Since there are lesser number of men, the amount of time needed will be greater.. Thus, you need to multiply the amount of hours by 2! If you are thinking why, look at the following steps
8/2=4 (men)
10 x 2= 20(time)

Thus the answer is 20

Hope this helped :))
arlik [135]2 years ago
4 0
Two hours bc if it takes 8 to do it in one hour and u split the number of men u have in half you double the work hours 8men=1hour of work 4men=2hours of work
Hope this helps have a nice day
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Answer:

The height of wall is 3 feet and length of wall is 5 feet

Step-by-step explanation:

Given as :

The Area of retaining wall = 15 square feet

Let The width of wall = W feet

The Height of wall = ( W - 2 ) feet

Now, Area of Rectangle = Height  width

Or , 15 ft² = ( W - 2 ) ft × W ft

Or,  15 = W² - 2 W

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Or,  W² - 5 W + 3 W - 15 = 0

Or, W ( W - 5 ) + 3 ( W - 5 ) = 0

So , ( W - 5 ) ( W + 3 ) = 0

So, W = 5 , - 3

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Hence The height of wall is 3 feet and length of wall is 5 feet. Answer

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3 years ago
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Answer:

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Step-by-step explanation:

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Serhud [2]

Answer:

View graph

Step-by-step explanation:

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d=\sqrt{(x_{2}-x_{1})^{2}+(y_{2}-y_{1})^{2} }

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ab is parallel to pr if slope ab is equal to slope pr

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finally distance ab is equal to distance pr/2

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8 0
2 years ago
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aev [14]

Answer:

3

Step-by-step explanation:

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3 years ago
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