SOLUTION: if i can paint a wall in 7 hours, and you can paint the same wall in 8 hours, how long would it take us to paint the wall together
Algebra.Com
Question 353757: if i can paint a wall in 7 hours, and you can paint the same wall in 8 hours, how long would it take us to paint the wall together
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
if i can paint a wall in 7 hours, and you can paint the same wall in 8 hours, how long would it take us to paint the wall together
-----
I's rate = 1/7 job/hr
---
You's rate = 1/8 job/hr
----
Together rate = 1/x job/hr
-------------------
Equation:
rate + rate = together rate
1/7 + 1/8 = 1/x
---
8x + 7x = 56
15x = 56
x = 56/15 = 3 11/15 hrs = 3 hrs (11/15)(60 min) = 3 hrs 44 minutes
---
together time = 3 hrs 44 minutes
===================================
Cheers,
Stan H.
RELATED QUESTIONS
I need explanation and solution:
Rustam can paint a wall in 1 hour and Anvar can paint... (answered by mananth,richwmiller)
David can paint a wall in 1 hour and Mike can paint the same wall in 2 hours. How long... (answered by Cromlix)
If painter A can paint a wall in one hour and painter B can paint the same wall in two... (answered by ikleyn,mccravyedwin,josgarithmetic,math_tutor2020)
Mike can paint a wall in three hours. Angelo can paint the same wall in two hours. How... (answered by checkley75)
A and b can paint a wall in 2 hours
A and C can paint the wall in 3 hours
B and C can (answered by josgarithmetic,Alan3354,ikleyn)
17 men can paint a wall in 6 days. How long will 2 men take to paint the same... (answered by stanbon)
Mark and Plato can paint one wall together in 8 minutes. It takes Mark and Plato the same (answered by josmiceli)
Painters A and B can paint a wall in 10 hours when working at the same time. Painter B... (answered by jorel1380)
painters A and B can paint a wall in 10 hours when working at the same time. Printer B... (answered by rwm)