Directions: Read the following information to answer the question.
Solution:
(A+B)’s 1 day’s work =[1/45+1/40]=17/360
⇒ Work done by B in 23 days=1×{23/40}=23/40
⇒ Remaining work =1−{23/40}
=17/40⇒ Now, 17/360 work was done by (A+B) in 1 day.
⇒ 17/40 work was done by (A+B) in 1×{360/17}×{17/40}=9 days.
Therefore, A left after 9 days.
Directions: Read the following information to answer the question.
Solution:
Work done by the waste pipe in 1 minute
⇒ 1/15–[1/20+1/24]
⇒ 1/15−11/120=−1/40
⇒volume of 1/40 part = 3 gallons.
Therefore, Volume of whole =(3×40)gallons = 120 gallons.
Directions: Read the following information to answer the question.
Solution:
Let's calculate how much time it takes to repair the road if just 1 person were working on it.
5 hours a day for 12 days makes it 60 hours per person.
39 people working 60 hours each makes it 39×60=2340 hours in total.
Now we have 30 people working 6 hours a day
⇒ That means 30×6=180 hours are spent each day.
We need a total of 2340 hours. With 180 hours every day,
that's going to take 2340/180= 13 days to complete...
Or you could just do it in one step... :)
39×12×5=30×x×6
2340=180x
x=2340/180
x = 13.
Directions: Read the following information to answer the question.
Solution:
Volume of water collected in the tank in 1 hour
⇒ 0.3×0.2×20×1000=1200 m cubic
If after t hours, the water is at height of 8m,
1200t=200×150×8
⇒ t = 200 Hours.
Directions: Read the following information to answer the question.
Solution:
1/A=10 and 1/B+1/C=1/4
(Given)
1/A+1/B+1/C=1/4+1/10=7/20
In 20 hours, working together they will complete 7 products.
Thus in 40 hours they will complete 14 products