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mariarad [96]
2 years ago
8

Can someone please give me the answer to this

Mathematics
2 answers:
Nimfa-mama [501]2 years ago
6 0

<em>THE CORRECT ANSWER IS 57 CM³</em>

Alenkinab [10]2 years ago
5 0

Answer:

Step-by-step explanation:

Volume of a cuboid = lxbxh

volume of bottom cuboid =

9 x 3 x 1 (1cm corresponds to the 1 cm at the top)

= 27 cm^3

volume of upper cuboid =

(5+3)x1x4

= 8 x 1 x 4

= 32 cm^3

total volume = 32 + 27

= 59cm^3

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<h3><u>Solution:</u></h3>

Given that it takes 12 hours for 7 men to paint a room

We are asked to find number of men required to paint the room in 3 hours

Recognize, "paint the room" is 1 task. One job.

7 men -------- 12 hours ------ 1 job

(7/7) = 1 men ------- 12 x 7 (84)  ------- same 1 job

The one men is rate is 84 hours to do the job

We can express this as 1/84 jobs per hour, the one-person rate

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Let the required number of men for 3 hours be "a"

The rates of each person is simply additive.

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corresponds to rate x hours = jobs and "a" is a variable for how many men

a \times \frac{1}{28} = 28

Thus 28 men are needed to paint the room in 3 hours

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