Question

At a furniture manufacturer, worker A can assemble a shelving unit in 5 hours. Worker B can assemble the same shelving unit in 3 hours. Which equation can be used to find t, the time it takes for worker A and worker B to assemble a shelving unit together?

Answer 1

Let's define the following variable:
 t = total time it takes to assemble a shelving unit together.
 We then have the following equation:
 1/5 + 1/3 = 1 / t
 Solving the equation we have:
 3t + 5t = 15
 8t = 15
 t = 1,875 hours
 Answer:
 the time it takes for worker A and worker B to assemble a shelving unit together is:
 t = 1,875 hours

Answer 2

Answer:

1/5t + 1/3t = 1

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