Answer:
7.24 hrs
Step-by-step explanation:
Janet can do the order in 14 hours.
In 1 hour, she can do 1/14 of the order.
Jim can do the order in 15 hours.
In 1 hour, he can do 1/15 of the order.
Let the total amount of time they take to do the job working together be x hours.
[tex]\frac{1}{14} x+\frac{1}{15}x =1[/tex]
[tex]\frac{29}{210} x=1[/tex]
[tex]\frac{210}{29}* \frac{29}{210} x=1*\frac{210}{29}[/tex]
[tex]x= 7.241379...[/tex]
