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Mazyrski [523]
2 years ago
11

If 12 workers can dig a tunnel in 100 days, how long will it take 20 workers to dig the tunnel

Mathematics
1 answer:
Paraphin [41]2 years ago
3 0

Answer:

60 days.

Step-by-step explanation:

This is  a proportion question. You compare two ratios. Unfortunately it is an inverse ratio.

12 = k/100                   Multiply both sides by 100

1200 = k

20 = k/x                       Multiply both sides by x

20x = k

20x = 1200                 Divide by 20

20x/20 = 1200/20

x = 60 days.  

An inverse proportion works by making a constant k. The  constant k makes the days shorter when the number of people increases. You should expect that. More people , less time.

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Step-by-step explanation:

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victus00 [196]
The answer is 370 because you need to work it out.

Basically what I did was look at the first number, 12, and the answer to the equation and saw that 12 x 10 would be 120. And 360 + 10 would be 370.

It fits in perfectly.

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Step-by-step explanation:

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