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It takes Alvin 3 hours to paint a room it takes Bernie 5 hours to do the same job how long would it take them to do the job together?
Wiki User
∙ 14y ago
Multiply 3 and 5 to get a Least Common Multiple. 15. So you find how many rooms can Alvin paint in 15 hours (5 rooms). Same with Bernie (3 rooms). That means they can paint 8 rooms in 15 hours. Since you want to find "how long it would take," you flip the rate over. In 15 hours they can paint 8 rooms. Reduce if you want, 15/8= 1.875 hour to paint one room.
Wiki User
∙ 14y ago
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If Joe can paint a house in 3 hours and Sam can paint the same house in 5 hours how long does it take for them to do it together?
Joe can paint the house in 3 hours so Joe paints 1/3 house in an hour. Similarly, Sam paint 1/5 of the house in one hour. So together (assuming no synergy) they paint 1/3 + 1/5 = 8/15 of the house in an hour. So they take 15/8 = 1 + 7/8 = 1.875 days to paint it.
If Sally can paint a house in 4 hours and John can paint the same house in 6 hour?
2 Hours & 24 minutes
How many person-hours does it require for 8 painters to paint a gym in 6 hours?
48
If 4 people can paint fences in 5 hours how many hours will it take for 8 people to paint fences?
Assuming all work at the same speed, all the time, 8 people will paint twice as fast; thus, you can divide the total time in 2.
It takes 8 painters to paint the gym in 6 hours. How many person-hours does this job require?
6 x 8=48 person hours
It takes Sal 5 hours to paint a house It takes Sal 3 hours to paint the same house How long will it take to paint the house if both of them work together?
It would take them 4 hours to paint the house together.
Caroline can paint a fence in 6 hours Her sister Lily can paint the same fences in 4 hours How long will it take them to paint the fence if they work together?
Caroline can paint half the fence in 3 hours and Lily can paint half the fence in 2 hours, so it will take a total of 5 hours for them to paint the fence while working together.
John can paint a fence in 9 hours Tim can paint the same fence in 11 hours How much time would the two working together need to paint the same fence?
4.95 hours
How do you translate a word phrase into a math expression?
if sally can paint a house in 4 hours and john can paint the same house in 6 hours, how long will it take for them to paint the house together?
Will can paint six rooms in 12 hours working alone If his friend Matthew helps him together they can paint the six rooms in 7 hours How long would it take Matthew to paint the 6 rooms by himself?
Mrs Kelley wants to paint her classroom. If Mrs. Kelley works alone, it will take her 2 hours to paint her room. If Mrs. McCartney painted the room alone, it would take her 4 hours to paint the room. If Mrs. Kelley can convince McCartney to help her, how long will it take them to paint the room together (in hours and minutes)?
If john can paint a house in 5 hours and joe can paint a house in 3 hours how long will it take for both of them to paint the house?
The way you calculate this (assuming that both work at constant speed) is:* Calculate what part of the house each person can paint in an hour. * Add both fractions together, to calculate what part of the house you can paint together. * Take the reciprocal of this last result, to calculate the number of hours.
Delbert can paint a fence by himself in 11 hours and Dorothy can paint the same fence in 12 hours How long will it take them to paint the fence if they work together?
Delbert can paint the fence in 11 hours so in 1 hour Delbert paints 1/11 of a fence. Similarly, in 1 hour Dorothy paints 1/12 of a fence. So together, in 1 hour they paint 1/11 + 1/12 = 12/132 + 11/132 = 23/132 of a fence. So to paint the fence together they would need 1 / (23/132) = 132/23 hours = 5.74 hours
If sally can paint a house in four hours and john can paint the same house in 6 hours how long will it take both of them to paint the house?
In one hour Sally paints one quarter and John paints one sixth, between them they paint five twelfths per hour so would take 2 hours 24 minutes if they worked together. But have you ever known a male and a female to work harmoniously together? Allow at least three hours!
What were he paint colors used on the bernie mac show set?
stupid colors
Two boys can paint a fence in 7 hours Two girls can paint the same fence in 5 hours In the unlikely event that they can work at the same pace together how long would the four people working togethe?
2.9 hours
Ben can paint a fence in three hours and billy takes 4hours how long will it take them painting together?
1.5 hours + 2 hours = 3.5 hours So 3.5 hours in total!
What formula is used to determine If sally cfan paint a house in four hours and john can paint the same house in 6 hours how long will it take for both of them to paint the house together?
You don't need a formula. You need to understand where the answer comes from. If you understand where the answer comes from, you can write your own formula. If you don't, then a formula can be dangerous in your hands. -- Sally can paint 1/4 of the house in an hour. -- John can paint 1/6 of the same house in an hour. -- If they work together, then can paint (1/4 + 1/6) = 5/12 of the house in an hour. -- If they paint 5/12 of the house in an hour, then it takes them 12/5 hours to finish the job, or 2.4 hours, or 2hours 24minutes. Well, OK. Here's the formula: S = number of hours it takes Sally J = number of hours it takes John Number of hours it takes them working together = 1 / (1/S + 1/J)
