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 the total work to be done be x
A unit work=x/5
B unit work=x/3
A+B unit work=5x+3x/15=8x/15
Therefore time taken by both=15/8hours=1.85hours