Question

if 18 assemblers take 4 hours to complete a job, how many hours will it take 12 assemblers to complete that same job.

Answer 1

Answer:

12 assemblers will take six hours to complete that same job.

Step-by-step explanation:

For answering this question correctly, we will use Inverse Rule of Three because the less assemblers work, the more time it takes to complete the job.

Assemblers   Hours

         18                4

         12                x

*******************************

12x = 18 * 4 (It's Inverse, remember)

12x = 72

x = 72/12

x = 6 hours

12 assemblers will take six hours to complete that same job.

Answer 2

The number of hours that will be used by 12 assemblers to complete the job will be 6 hours.

Based on the information given, let the number of hours used by 12 assemblers be represented by x.

Therefore, the equation to solve the question will be:

18/12 = x/4

Cross multiply

12x = 18 × 4

12x = 72

x = 72/12

x = 6

Therefore, 6 hours will be used.

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