Ravi, Rahul and Rohan can do a piece of work in 24 days, 30 days and 40 days respectively. They started working together but Rohan left 4 days before the completion of the work. How many days were spent on completing the work?
a. 11 days
b. 12 days
C. 13 days
D. 14 days
Answers
Answer:
ll22
Step-by-step explanation:
Answer:
Step-by-step explanation:
Ravi, Rahul and Rohan can do a piece of work in 24 days, 30 days and 40 days respectively. They started working together but Rohan left 4 days before the completion of the work. How many days were spent on completing the work?
a. 11 days
b. 12 days
C. 13 days
D. 14 days
Answer
Ravi's one day work = 1/24 part
Rahul one day work = 1/30 part
Rohn one day work = 1/40 part
Total person one day work = 1/24+1/30+1/40
= (5+4+3)/120 =12/120 = 1/10 part
In four day completed part of work = 4/10 = 2/5
Ravi's and Rahul's one day work = 1/24+1/30 = (5+4)/120
= 9/120= 3/40 part
They completed full work in 40/3 days
but Remaining work = 1-2/5 = 3/5 part
if they comlete work 40/3 days then
3/5 part is = (40/3)×(3/5) = 8 days
Answer