SOLUTION: can someone help me by tuesday plss :(? solve the problem. joanne mows the front yard in 40 min, while hope can mow the same yard in 50 min. how long would it take them, workin

Algebra ->  Rate-of-work-word-problems -> SOLUTION: can someone help me by tuesday plss :(? solve the problem. joanne mows the front yard in 40 min, while hope can mow the same yard in 50 min. how long would it take them, workin      Log On


   



Question 453010: can someone help me by tuesday plss :(?
solve the problem.
joanne mows the front yard in 40 min, while hope can mow the same yard in 50 min. how long would it take them, working together with two mowers, to mow the yard?

Found 2 solutions by mananth, ikleyn:
Answer by mananth(16949) About Me  (Show Source):
You can put this solution on YOUR website!
Mowing the lawn= 1 job
Joanne 40 minutes
She does 1/40 job in 1 minute
hope 50 minutes
He does 1/50 of thejob in 1 minute

Together they will do 1/40 + 1/50
Together they will do 4/89 of the job in one minute
So they will take 22 2/9 minutes
So they will take 22.22 minutes

Answer by ikleyn(53619) About Me  (Show Source):
You can put this solution on YOUR website!
.
can someone help me by tuesday plss :(?
solve the problem.
joanne mows the front yard in 40 min, while hope can mow the same yard in 50 min. how long would it take them,
working together with two mowers, to mow the yard?
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


        In the post by @mananth, the internal calculations are presented in wrong form
        and can scare/confuse a reader. So I came to make a job as accurately as it should be done.


Joanne makes 1/40 of the job per minute.

Hope makes 1/50 of the job per minute.


Working together, the make  

    1%2F40 + 1%2F50 = 5%2F200 + 4%2F200 = 9%2F200

of the gob per minute.


Hence, they need  200%2F9 = 222%2F9  minutes to complete the job working together.


ANSWER.  The need 222%2F9 minutes to complete the job working together.

Solved correctly and presented in the normal form as it should be done.