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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.

Related Questions

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.


How can you say that time is money?

Typically, jobs are based on either a per-hour rate or a flat fee (salary). When using the per-hour basis, the longer a job takes, the more money is earned. Alternately, a flat-fee or salary based job gives one price no matter the length of time a job may take. Therefore, the longer a job takes, the less money one would make. For example, if a job is quoted at $100 and it takes 10 hours to complete, the average earnings would equal $10 per hour, subsequently, if the time to complete the job were only 2 hours, the earnings would be $50 per hour.


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?

My somewhat educated guess would be two hours. The person who could complete the job in 3 hours could complete 2/3 of the job in two hours. The person that complete the job in 6 hours could complete 1/3 of the job in two hours. 2/3 + 1/3 = 1.


HOW MANY HOURS DID IT TAKES TO RENEW AN CAR ENGINE?

That is an 8 hour job.


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.


Thirty men take 20 days to complete a job working 9 hours a dayHow many hour a day should 40 men work to complete the job?

9 1/2 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!


Wages of assembly line workers in 1920's?

Approx. 13 cents per hour. Although it depends what exactly their job was.


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


2 What exactly do you look for in a job?

1. What exactly do you look for in a Job?


What does a aeronautical engineer exactly do please tell me in details I meant his job?

See the link below for a complete description of Aeronautical Engineer.


What crime is committed when a contractor takes money but does not complete the job?

If a contract was in force - contract fraud. Otherwise civil fraud.