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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.
Juan accepted a job to roof a new house He can complete the job in 20 hours His trainee takes 25 hours to complete the job How much time should the two of them working together need to roof the house?
It will take about 11.1 hours for the two of them to complete the roofing of the house.
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!
If it takes 9 men 5 hours to do a job how long will it take 3?
9 men taking 5 hours = 9 x 5 = 45 hour job 3 men doing a 45 hour job = 45 / 3 = 15 hours
If it takes 10 electricians to get the job done in 6 hours how many electrician will it take to complete the job in 4 hours?
It should take 15 electricians provided that two unlikely conditions are satisfied:all electricians work at exactly the same rate, andthe job contains no parts which are time-dependent. For example, if an instalment must be tested for 5 hours, then even infinitely many electricians will not do the job in 4 hours.
