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If 15 workers can finish a task in 42 hours, calculate the number of workers required to complete the same task in 30 hours.

If 15 workers can finish a task in 42 hours, calculate the number of workers required to complete the same task in 30 hours.

 

Grade:12

1 Answers

Anand Kumar Pandey
askIITians Faculty 5733 Points
5 months ago
Dear Student

In this situation, the number of workers varies indirectly with the time required to finish a task.

Thus, they are inversely proportional.

Now, assume that the number of workers required to complete the task in 30 hours be “x”.

Here, the number of workers ∝ 1/hours

Or,

Number of workers = C/hours (here “C” is the constant of proportionality)

Now, consider the first case: “15 workers can finish a task in 42 hours”

Here, 15 = C/42

=> C = 15 × 42 = 630.

Now, consider the second case: “x workers can finish a task in 30 hours”

Here, x = C/30

x = 630/30
x = 21

the number of 21 workers are required to complete the task in 30 hours.

Thanks

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