Question

Jessica and Franklin are volunteering to paint one of their community member’s fences for service hours. If Jessica could complete the job in 6 hours and Franklin could complete the job in 4.5 hours, how long would it take them to complete the job together, to the nearest minute?

Answer 1

`(1)/(t) = (1)/(6) + (1)/(4.5) = (3+4)/(18) = (7)/(18)`
t=18/7=2.57 hour =154 min

Answer 2

2.57 hours approximately