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Worker A can complete a job in 20 hours and worker B can complete a job in 25 hours if both workers work together how long will it take them to complete the job?
The way to calculate this is to figure out what fraction each does in an hour (1/20 of the job, vs. 1/25 of the job). Add the fractions together to see how much they do together in an hour, then take the reciprocal to find out how many hours it takes them.
A company has a machine that can complete a job in 6 hours A new machine can complete the job in 2 hours How long would it take the new machine to complete the job alone?
3 hours
If one machine can complete a truckload in 2 hours and the second machine can complete a truckload in 4 hours how long would it take to complete a truckload if both machines worked on it together?
Machine # 1 works at a rate of 1/2 truckload per hour, while machine 2 works at a rate of 1/4 truckload per hour. The two machines together work at a rate of 3/4 truckload per hour complete the job 1/(3/4) = 1-1/3 hours.
How long is 32 hours?
192 minutes or 0.1333333 hours.
Two people are painting a fence one takes 3 hours to complete the job and one takes 6 hours to complete the same job how long would it take for both to complete the same job -?
Well, darling, if one person takes 3 hours and the other takes 6 hours to paint the fence, then when they join forces it will take them 2 hours to finish the job together. It's simple math, honey. Just add their individual rates of work to get the combined rate and then divide the total job by that rate. Easy peasy lemon squeezy!
