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Sagot :
If they work together, they need 15/8 hours to assemble one shelving unit.
What does work mean in math?
- In summary, work is done when a force acts upon an object to cause a displacement.
- Three quantities must be known in order to calculate the amount of work.
- Those three quantities are force, displacement and the angle between the force and the displacement.
According to tittle, we know worker A can assemble a shelving unit in 5 hours , which means worker A can finish 1/5 of work in 1 hour . And worker B can finish 1/3 of work in 1 hour.
If A & B work together , they will spend the same time t to assemble only one shelving .
That means, 1/5t + 1/3 t = 1 (equation)
1/5 t is worker A's workload during time t , 1/3 t is worker B workload.
So, 1/5 t + 1/3t = 1 is the answer
⇒ 5t + 3t = 15
⇒ t = 15/8 hours
If they work together, they need 15/8 hours to assemble one shelving unit.
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