Question

Each of 10 machines works at the same constant rate doing a certain job. The amount of time needed by the 10 machines, working together, to complete the job is 16 hours. How many hours would be needed if only 8 of the machines, working together, were used to complete the job?

Answer 1

Answer:

t = 20 hr

Explanation:

Given data:

Total number of machine = 10

Total time for machine is 16 hr

we know that $Time \times rate = job$

From the information given in the question  we have

[/tex]16\times 10x = job[/tex]

As demand in the question we have

$t \times 8x = job$ , job will remain same as before so

solving for t

$16\times 10x = t \times 8x$

t = 20 hr