SOLUTION: Haileys father can paint a house 1.5 times faster then Hailey can. they work together on one house and it takes them 14 hours. How many hours will it take Hailey to paint a house

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Question 1035313: Haileys father can paint a house 1.5 times faster then Hailey can. they work together on one house and it takes them 14 hours.
How many hours will it take Hailey to paint a house working alone

Found 3 solutions by josgarithmetic, ankor@dixie-net.com, ikleyn:
Answer by josgarithmetic(39799)   (Show Source): You can put this solution on YOUR website!
This is the first analysis of the description for their rates of work:

PERSONS             RATE AS JOBS/HOURS
Father              
Hailey               
Both Together        



Answer by ankor@dixie-net.com(22740)   (Show Source): You can put this solution on YOUR website!
Haileys father can paint a house 1.5 times faster then Hailey can.
they work together On one house and it takes them 14 hours.
how many hours will it take Hailey to paint a house working alone?
:
let t = time for Father to paint the house alone
then
1.5t = time for Hailey to do it
:
let the completed job = 1
+ = 1
multiply equation by 3t, cancel the denominators
3(14) + 2(14) = 3t
42 + 28 = 3t
70 = 3t
t = 3/70
t = 23 hrs for Father to paint the house
:
" how many hours will it take Hailey to paint a house working alone"
1.5 * 23 = 35 hrs for Hailey

Answer by ikleyn(53763)   (Show Source): You can put this solution on YOUR website!
.
Haileys father can paint a house 1.5 times faster then Hailey can. they work together on one house and it takes them 14 hours.
How many hours will it take Hailey to paint a house working alone
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Let r be the Haileys rate of work, measured in job-per-hour.
Then Haileys father's rate of work is 1.5*r, measured in job-per-hour.

Their combined rate of work (when they are working together) is r + 1.5r = 2.5r.

From the condition, 2.5r = .

Hence, r =  = .

It means that it takes Haileys 35 hours to complete the job.

To solve this problem, you do not need to solve quadratic equations.



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