1. If 2 carpenters can build the formwork for a foundation in 12 hours, how long will it take 3 carpenters to build the same foundation?
let s say 2*12=24 is the job
2 carpenters in 12 hours doing 24 job
3 carpenters in x hours doing 24 job
2*12=3*x
24=x*3
x=8
Very nice, Solveit.....!!!!
