Posted by Kacey on Friday, May 1, 2009 at 2:05am.
Use the equation
Tt = 1/Tf + 1/Ts
where Tt is the total time, Tf is the first person's time, and Ts is the second person's time. Now just plug and chug.
ah:
{ 1/Tt } = 1/Tf + 1/Ts
because
A --> 1/3 rooms per hr
B --> 1/4 rooms/hr
(A+B) --> 1/3 + 1/4 rooms/hr = 7/12 rooms per hr
which is 12/7 hours/room
Related Questions
math - If painter A can paint a room in three hours by themselves, and painter B...
Intermediate Algebra - Joe can paint a room in 6 hours while Sue can paint the ...
math - Arthur can paint a room in 6 hours. Boris can paint the same room in 8 ...
Algebra - If Dale can paint a room in 5 hours alone and Chip can paint the same ...
algebra2/trig - tina can paint a room in 8 hours, but when she and her friend ...
Math - Al can paint a room in a hours working alone. Bill can paint a room in b ...
algebra - you can paint a room in 8 hours. your friend and you can paint a room ...
math - Shelby can paint a room in 4 hours. Zoe can paint the same room in 7 ...
Word problem - Edward can paint a bedroom in 3hr. Jeb can paint the same room in...
Geometry - A gallon of paint costs $20 and covers 465 square feet. Three coats ...
For Further Reading
