A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing


  • 5 years ago

If Sally can paint a house in 4 hours, and John can paint the same house in 6 hours, how long will it take both of them to paint the house together?

  • This Question is Closed
  1. amistre64
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    the trick to solving this type of problem is to find out how much work is done by each person in 1 hour. Since S can paint one whole house in 4 hours; how much of the house cah she paint in 1 hour? S paints 1/4 of the house in 1 hour. How long does it take J to paint the entire house? ^ hours. which means that in 1 hour J has 1/6 of the house painted. How we can add together S and J to see how much of the house they can paint together in 1 hour: 1/4 + 1/6 = amount painted by both in 1 hour. 10/24, which reduces to 5/12 of the house is painted in one hour. then its just a matter of counting out the hours till it is completed... 1 hour = 5/12 2 hours = 10/12 there is only 2/12 of the house left to paint so its gonna take less than an hour... 2/12 reduces to 1/6; we divide the hour up into more basic units...into minutes. 60 minutes equals 1 hour and we want 1/6the of those minutes.. 60/6 = 10 minutes They can paint the house in 2 hours and 10 minutes.....

  2. Not the answer you are looking for?
    Search for more explanations.

    • Attachments:

Ask your own question

Sign Up
Find more explanations on OpenStudy
Privacy Policy

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...


  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.