Question

12 workers take 4 hours to complete a job. How long would it take 15 workers to complete the job?​

Answer 1

3 hours and 12 minutes

Explanation:

In order to solve this problem, we can use the formula:

`\sf workers * time = work`

We know that 12 workers take 4 hours to complete a job.

Therefore, we can say:

`\sf 12 * 4 = work`

Solving for work we get:

work = 48 hours

Now, we need to find out how long it would take 15 workers to complete the same job.

Let's call this time x. We can set up another equation:

`\sf 15 * x = 48`

Solving for x, we get:

`\sf x= (48 )/(15 )= 3.2`

In hours and minutes, it can be expressed as:

`\textsf{3 hours and 20\% of 60 minutes }`

`\textsf{3 hours and }\sf (20)/(100)* 60\textsf{ minutes }`

`\textsf{3 hours and 12 minutes }`

Therefore, it would take 3 hours and 12 minutes for 15 workers to complete the job.