SOLUTION: Hello, Can you please help me with this question? 1. Solve the following parallel process word problem: Rusty can wash a horse in 1 hour. Gary can wash a horse in 2 hours.

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Question 879180: Hello,
Can you please help me with this question?
1. Solve the following parallel process word problem:
Rusty can wash a horse in 1 hour. Gary can wash a horse in 2 hours.
How long would it take Rusty and Gary to wash a horse if they
worked together?
2. Solve the following parallel process word problem:
Jessica can wash a horse in 1 hour. If she assists with Rusty and
and Gary (from Problem #1 above), how long will it take the three
of them working together to wash a horse.

Found 2 solutions by josmiceli, ewatrrr:
Answer by josmiceli(19441)   (Show Source): You can put this solution on YOUR website!
Rusty's rate:
( 1 horse washed ) / ( 1 hr )
Gary's rate:
( 1 horse washed ) / ( 2 hrs )
Working together:
( 1 horse washed ) / ( t hrs )
--------------------------

Multiply both sides by



It would take them 2/3 hr working together
---------------------------------------
Jessica's rate:
( 1 horse washed ) / ( 1 hr )
The rate for Gary and Rusty was:
( 1 horse washed ) / ( 2/3 hr )
--------------------------
I can find a new time for
all three working together:


Multiply both sides by



All 3 working together would take
2/5 hr

Answer by ewatrrr(24785)   (Show Source): You can put this solution on YOUR website!
 
Hi
|Multiplying thru by 2x so as all denominators = 1
2x + 1x = 2
3x = 2
x = 2/3 hr together

2x + 2x + 1x = 2
5x = 2
x = 2/5 hr together
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