A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • 4 years ago

A certain job can be done by 72 men in 100 days. There were 80 men at the start of the project but after 40 days, 30 of them had to be transferred to another project. How long will it take the remaining workforce to complete the job?

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

    i get 80 days but i could be wrong

  2. anonymous
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    yes the answer is 80,but how come, i really forgot how to solve work problem

  3. anonymous
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    there is probably a snappy way to do this, but i don't know of one. i said "if 72 men take 100 days to complete 1 job, then each man completes \[\frac{1}{7200}\]of the job per day"

  4. anonymous
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    you had 80 men working for 40 days and \[\frac{80\times 40}{7200}=\frac{4}{9}\] meaning they completed 4/9 th of the job, leaving 5/9 to be completed.

  5. anonymous
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    now 30 leave, so there are 50 men left, and we need to solve \[\frac{50\times x}{7200}=\frac{5}{9}\] and that gives \[x=80\]

  6. anonymous
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    like i said, there is probably a snappier way to do it

  7. anonymous
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    i should recall to solve this kind of problem, thanks then :D

  8. 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...

23

  • 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.