Q. If A can do as much work in 4 hours as B can do in 6 hours, or as C can do in 8 hours how long will it take C to complete a piece of work , one third of which has been done by A working 8 hours and B working 18 hours?
Answers
Answered by
1
Answer: 80 hours
Step-by-step explanation:
Work done by a in 1 hour=1/a
Work done by b in 1 hour=1/b
Work done by c in 1 hour=1/c
4/a=6/b=8/c
atp,
(8/a)+(18/b)=1/3 work
(8/a)=(12/a)=1/3 work
a=60
a do in 1 day=1/60 work
c do in 1 day=1/60*2=1/120 work
c finish 1 work in=120 hours
c finish 2/3 work in=80 hours
Similar questions