+0  
 
0
32
1
avatar

If Jackie were to paint her living room alone, it would take seven hours. Her sister Rachel could do the job in nine hours. How many hours would it take them working together?

 Aug 30, 2020
 #1
avatar
0

1/7  +  1/9 = 1 / J

 

J =3.9375 hours - for both working together.

 Aug 30, 2020

59 Online Users

avatar