MEDIUM
Earn 100

A machine P can print one lakh books in 8 hours, machine Q can print the same number of books in 10 hours while machine R can print them in 12 hours. All the machines are started at 9 A.M.  while machine P is closed at 11 A.M.  and the remaining two machines complete work. Approximately at what time will the work (to print one lakh books) be finished?

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Important Questions on Ratio, Proportion and Variation

MEDIUM
Quantitative Aptitude>Arithmetic>Ratio, Proportion and Variation>Time and Work
A,B, and C together complete a work in 2 days. If A and B need 2.4 days to complete the work, while B and C together complete the work in 4 days then in how many days will B alone do the work?
EASY
Quantitative Aptitude>Arithmetic>Ratio, Proportion and Variation>Time and Work
Deepa and Seema together do a work in 6 days. Deepa can complete the same work alone in 9 days. In how many days will Seema complete the work alone ?
EASY
Quantitative Aptitude>Arithmetic>Ratio, Proportion and Variation>Time and Work
Ratio of days required by A and B to complete some work is 3:5. They require 558 days to complete the work. In how many days can A alone complete twice the work?
HARD
Quantitative Aptitude>Arithmetic>Ratio, Proportion and Variation>Time and Work
Indira and Chandra can do a task separately in 20 days and 80 days respectively. Indra begins the work and works for 3 days and then takes a leave for five days during those days Chandra works. This process continues till the end of the work. How many days are taken to complete the work? 
EASY
Quantitative Aptitude>Arithmetic>Ratio, Proportion and Variation>Time and Work

Ten people can do a work in 30 days. In how many days, can 15 people complete double the work - 

1.40

2. 25

3. 20

4. 45 

EASY
Quantitative Aptitude>Arithmetic>Ratio, Proportion and Variation>Time and Work
X and Y can complete a work in 5 days. Y and Z can complete the same work in 6 days. Z and X can complete the same work in  152  days. In How many days will  X, Y and Z toogether complete the work?
EASY
Quantitative Aptitude>Arithmetic>Ratio, Proportion and Variation>Time and Work
20 dogs can eat 20 hens in 10 days. In how many days 40 dogs eat 40 such hens?
EASY
Quantitative Aptitude>Arithmetic>Ratio, Proportion and Variation>Time and Work
5 men take 20 days to complete a task. They work 8 hours per day. 8 men work for 7 hours a day, then in how many days will they finish the task? 
EASY
Quantitative Aptitude>Arithmetic>Ratio, Proportion and Variation>Time and Work

G is twice as fast as S in doing work. If G can do a work in 30 days less than S, how many days will they take to complete the work together? 

1. 25
2. 20
3. 22
4.15 

MEDIUM
Quantitative Aptitude>Arithmetic>Ratio, Proportion and Variation>Time and Work
A and B can complete a piece of work in 6 and 12 days separately. If they work jointly, how long will they take to complete this piece of work ?
MEDIUM
Quantitative Aptitude>Arithmetic>Ratio, Proportion and Variation>Time and Work
9800 J of energy was spent to raise a mass of 70 kg. The mass was raised to a height of _____?
EASY
Quantitative Aptitude>Arithmetic>Ratio, Proportion and Variation>Time and Work
A is twice as good a workman as B and together, they finish a piece of work in 14 days. The number of days taken by A alone to finish the work is:
EASY
Quantitative Aptitude>Arithmetic>Ratio, Proportion and Variation>Time and Work
X can complete a work in 27 days, and Y can do the same work in half of the time taken by X. They are working together, what part of the same work they can complete in a day?
EASY
Quantitative Aptitude>Arithmetic>Ratio, Proportion and Variation>Time and Work
Working 9 hours a day, Manish can read a book in 16 days. How many hours a day should he work so as to finish the same work in 24 days?
HARD
Quantitative Aptitude>Arithmetic>Ratio, Proportion and Variation>Time and Work
X can complete 57th part of a work in 10 days and Y can complete 34th part of the same work in 9 days. In how many days will both complete 1321st part of the total work?
MEDIUM
Quantitative Aptitude>Arithmetic>Ratio, Proportion and Variation>Time and Work
M alone can do a work in 50 days. M is 10% less efficient than N. In how many days can N alone do the same work?
EASY
Quantitative Aptitude>Arithmetic>Ratio, Proportion and Variation>Time and Work

X can do 5 times faster work than that of Y and so it takes 36 days less than Y. Find the time in which X alone can complete the work?

MEDIUM
Quantitative Aptitude>Arithmetic>Ratio, Proportion and Variation>Time and Work
10 persons can build a wall in 8 days. How may persons can build the wall in half day ?
HARD
Quantitative Aptitude>Arithmetic>Ratio, Proportion and Variation>Time and Work
A and B can do a job together in 12 days. A is 2 times as efficient as B. In how many days can B alone complete the work?
MEDIUM
Quantitative Aptitude>Arithmetic>Ratio, Proportion and Variation>Time and Work
A group of soldiers can completely destroy an enemy camp in 5 days. However, 9 soldiers were injured. The remaining soldiers destroyed the camp in 8 days. Calculate the actual number of soldiers who destroyed the camp?