4.95 hours
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?
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.
4 workers would need 40 hours to paint 200 trucks, so 20 workers would paint your 200 in 8 hours.
I think the correct answer is 4800 mils in a gallon.
There would be alittle bit left
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.
2.9 hours
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
1.5 hours + 2 hours = 3.5 hours So 3.5 hours in total!
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)?
It would take them 4 hours to paint the house together.
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?
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)
You just need two pronouns to fix this sentence.The correction is:"Will you help those people paint their fence?" asked his father.
Yes, if you paint multiple coats to prevent transparency.
Yes you can paint over dark colored fence. You may have to apply more than one coat of paint on it if you want the color to be brighter.
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.