<PRE><B>Question 759953</B>
What is the work rate for 1 boy?


4 boys do the job in 2 hours;
1 boy does the job in 2*4 hours, or 8 hours.


* Rates of simultanous working boys are additive.
* Each boy works at the rate of 1/8 jobs per hour.
* Basic relationship is {{{R*t=j}}}, using R for rate, t for time, j for how many jobs.


Five boys work together.
{{{highlight(5*(1/8)*t=1)}}}
Find t hours.</PRE>