Answer:
Bo =6.4 hours
Step-by-step explanation:
"Jo and Bo are opening a fast food chain called Jobangles. Now together they can make a day's worth of fries in 3.2 hours. If it takes Jo 5 hours to make a day's worth of fries alone, then how long will it take Bo to make a day's worth of fries alone?"
we want to find Bo's hourly rate given the combined work rate for the both of them
given that both combined rate= 3.2hours
Jo takes 5 hours
the expression for combined work rate is
let Jo be J
and Bo be B
1/J+1/B=1/T
J+B/JB=1/3.2
5+B/JB=1/3.2
cross multiply we have
3.2(5+B)=5B
16+3.5B=5B
16=5B-3.5B
16=2.5B
B=16/2.5
B=26.4
