A can finish a work in 5 days and B takes 4 days to do the same work. If the work is increased by 8 times, how many days will it take for both of them to finish the work if they work together?
Answers
Answered by
6
Answer:
A takes 5 days and B takes 4 days to compete the work.
Let's say total work is 20 units (which can be easily cancelled by 5 & 4)
So the rate of work of A= 20/5 =4 units per day
Rate of work for B= 20/4 = 5 units per day
Together they can do 5+4= 9 units per day.
Now we assumed total work as 20 units in beginning. Just increase it 8 times.
New total work= 20*8 = 160 units
Therefore, they will take 160/9 days or 17.77 days or 17 days and 18 hours or 18 days approx.
Similar questions