Problema Solution
Janice can paint a room in 8 hours. When she works with ger partner Alison, the two can paint the same room in 3 hours. how long would it take Alison to paint the room alone?
Answer provided by our tutors
Janice can paint a room in 8 hours.
The rate of Janice is: 1/8 room per hour.
The two can paint the same room in 3 hours.
The together rate is: 1/3 room per hour.
Let x represent the hours that Alison needs to paint the room alone, x>0
The rate of Alison is: 1/x room per hour.
1/8 + 1/x = 1/3
........
........
x = 4.8 hr
x = 4 hr 0.8*60 min
x = 4 hr 48 min
Alison can paint the room alone is 4 hours and 48 minutes.