grace-thompson_60bb3f7f90db4
grace-thompson_60bb3f7f90db4
About
- Username
- grace-thompson_60bb3f7f90db4
- Joined
- Visits
- 0
- Last Active
- Roles
- Member
Comments
-
Jack can paint 1/12 apartment in 1 hour. His wife can paint 1/20 apartment in 1 hour. Together they can paint (1/12 + 1/20 = 32/240 = 2/15) apartment in 1 hour. Therefore it will take them 15/2 hrs = 7 hrs 30 min to paint an apartment together.