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Earn 100

A, B, and Care assigned a piece of job that they can complete by working together in 15 days. Their efficiencies (measured in terms of rate of doing job) are in the ratio of 1:2:3. After one-third of the job is completed, one of them has to be withdrawn due to budget constraint. Their wages per day are in the ratio of 3 : 5 : 6. The number of days in which the remaining two persons can finish the job (at optimal cost) is:

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Important Questions on Arithmetic

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Quantitative Aptitude for the CAT>Chapter 2 - Arithmetic>Practice Exercises>Q 47
Labour allocation is a very important process. A particular weaving section has 20 looms and with five labourers, loom efficiency is 75%. The production of a loom at 100% efficiency is 10 m/h. Salary of a labourer is ₹11,000 per month. I removed one labourer due to which the efficiency came down to 70%. How much do I gain or loose due to this action? (Assume that the profit on 1 m cloth is ₹ 4 and the looms are working for 30 days in a month and 10 hours per day.)
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Quantitative Aptitude for the CAT>Chapter 2 - Arithmetic>Practice Exercises>Q 48
To make an article, it takes 40 h for a workman who is paid ₹ 1.80 per hour. 20% the material of is wasted in the course of working, which costs ₹ 22.5 per kilogram. At what price, the article must be sold so as to yield a profit of 33.33%, if its weight was measured to be 8 kg?
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Quantitative Aptitude for the CAT>Chapter 2 - Arithmetic>Practice Exercises>Q 1
At their usual efficiency levels, A and B together finish a task in 12 days. If A had worked half as efficiently as she usually does, and B had worked thrice as efficiently as he usually does, the task would have been completed in 9 days. How many days would A take to finish the task if she works alone at her usual efficiency?
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Quantitative Aptitude for the CAT>Chapter 2 - Arithmetic>Practice Exercises>Q 2
Anil alone can do a job in 20 days while Sunil alone can do it in 40 days. Anil starts the job, and after 3 days, Sunil joins him. Again, after a few more days, Bimal joins them and thay together finish the job, If Bimal has done10% of the job, then in how many days was the job done?
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Quantitative Aptitude for the CAT>Chapter 2 - Arithmetic>Practice Exercises>Q 3
A tank is fitted with pipes, some filling it and the rest draining it. All filling pipes fill at the same rate, and all draining pipes drain at the same rate. The empty tank gets completely filled in 6 hours when 6 filling and 5 draining pipes are on, but this time becomes 60 hours when 5 filling and 6 draining pipes are on. In how many hours will the empty tank get completely filled when one draining and two filling pipes are on?
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Quantitative Aptitude for the CAT>Chapter 2 - Arithmetic>Practice Exercises>Q 4
Humans and robots can both perform a job but at different efficiencies. Fifteen humans and five robots working together take thirty days to finish the job, whereas five humans and fifteen robots working together take sixty days to finish it. How many days will fifteen humans working together (without any robot) take to finish it?
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Quantitative Aptitude for the CAT>Chapter 2 - Arithmetic>Practice Exercises>Q 5
When they work alone, B needs 25% more time to finish a job than A does. They two finish the job in 13 days in the following manner: A works alone till half the job is done, then A and $\mathrm{B}$ work together for four days, and finally B works alone to complete the remaining 5% of the job. In how many days can B alone finish the entire job?
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Quantitative Aptitude for the CAT>Chapter 2 - Arithmetic>Practice Exercises>Q 6
A tank is emptied everyday at a fixed time point. Immediately thereafter, either pump A or pump B or both start working until the tank is full. On Monday, A alone completed filling the tank at 8pm. On Tuesday, B alone completed filling the tank at 6pm. On Wednesday, A alone worked till 5pm, and then B worked alone from 5pm to 7pm, to fill the tank. At what time was the tank filled on Thursday if both pumps were used simultaneously all along?