It takes Sally 4 hours to deliver newspapers. If Kathy works alone, it takes her 6 hours. How long would it take them working together to deliver all of the newspapers?

Question

anonymous · Answer

(x/4)+(x/6)=1

anonymous · Answer

4x+6x=24
     10x=24
        x = 24/10
        x =2.4 hours

sriram · Answer

x newspapers--- 4hrs    x/4 newspapers in  1 hr
x news papers--- 6 hrs  x/6 news papers per hr
let total time be t
total news papers to be delivered again=x
(x/4)*t+(x/6)*t=x
dividing by x
t/4+t/6=1

anonymous · Answer

click good answer if I desever