It should take 15 electricians provided that two unlikely conditions are satisfied:
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!
It will take about 11.1 hours for the two of them to complete the roofing of the house.
because it takes 24 hours for the earth to do a complete rotation around its axis
The hour hand takes twelve hours for a complete circle, 360 degrees. Twelve hours is 12x60 minutes = 720 minutes. If 360 degrees takes 720 minutes, 1 degree takes 720 divided by 360. 720/360 = 2 minutes.
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.
Don't worry, your son will certainly be paid. It takes about 2,000hours of on the job training and 144 hours of coursework for the length of a electricians apprenticeship.
Journeyman electricians need 8000 hours of training underneath a master electrician. To become a master electrician you'll have to complete 12000 hours on the job training under the supervision of a master electrician. Then you'll have to pass the licensing exam. From start to finish this usually takes 6 years. To be come a master you begin as an apprentice work your way up to a journeyman, and then become a master apprentice. No formal training is required, just on the job experience.
only one, but he takes 4 hours minimum and also takes 12 light bulbs.
It takes Saturn about 10.7 hours to complete a rotation on its axis.
Saturn takes about 10.7 hours to complete one full rotation on its axis.
It takes the Earth approximately 24 hours to complete one rotation on its axis, not one year. A year is the time it takes for the Earth to complete one orbit around the sun.
it takes 24 hours
On the planet Venus, it takes 5,832 hours to complete a full rotation on the axis
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.
Earth's rotation takes approximately 24 hours to complete, causing day and night cycles on the planet.
It takes about 9 hours to complete The Saboteur.
24 hours