Aptitude Time and Work Test Paper 731) A, B, and C together can complete a work in 6 days. The efficiency of A and C is 3 times of B, and the efficiency of A is 4 times of C, and then they alone can finish the job in how many days.
Answer: A Explanation: ATQ, (A+B+C) can finish a work in 6 days The efficiency of (A+C): B = 3: 1 Then total work = Efficiency * total days Now, Efficiency of A: C= 4: 1 The total work, in this case, = Efficiency of (A and C) * days 32) A does half as much as work as B in 1/6 of the time taken by B. Together they can complete the work in 10 days. B alone can complete the work in how many days?
Answer: C Explanation: Let B does 1 work in x days That means time ratio of A: B = x: x/3 As we know that the efficiency ratio is inversely proportional to time ratio i.e., Efficiency ratio of A: B = 1: 3 ATQ, (A+B) = 10 days So, B can finish the work in 40/1 = 40 days. 33) A man can finish a work in 20 days, a woman can finish the same work in 30 days, and a boy can finish the same work in 60 days. 2 men, 8 women, and some boys working together can finish the work in 2 days. Find how many boys are working?
Answer: B Explanation: Note: Assume the total work = LCM of the given days Take the LCM of days = LCM of (20, 30, and 60) = 60 1 Man's one day work = 60/20 = 3 unit ATQ, (2Men + 8Women + x Boy) can finish a work in 2 days. Or, (2Men + 8women)'s 1 day work = 2 * 3 + 8*2 = 22 Or, (2Men + 8women)'s 2 day work = 22* 2 = 44 By equation 1, 1 boy completes 1 unit work per day 34) A contractor undertakes to complete the job in 38 days. He assigns 30 workers on the job, and after 25 days he assigns 5 more workers and finishes the work one day before the given time. If he did not assign extra numbers of workers then work will be late by how many days.
Answer: A Explanation: ATQ, target = work should be finished in 38 days Now, after assigning more workers, the work is finished in 37 days. Note: man * days = total work As per the given information, Note: 1 worker = 1 unit work per day So, if work is done by 30 workers, i.e., 30 units of work per day Target with 30 workers = 38, but it will take 39 days 35) 30 men can complete the work in 30 days. If after every 10 days, 5 workers leave the job, the work will be finished in how many days?
Answer: D Explanation: Men = 30, days = 30 Total work = men * days = 30*30 = 900 units of work ATQ, 1st 10 days work done = Men * days = 30*10= 300................ (i) The total work done in 40 days = 300+ 250+ 200+ 150 = 900 units ATQ, the total work which is 900 units should be completed in 30 days, but according to the solution, it takes 10 more days to get completed. So, the work will be completed in 40 days. Aptitude Time and Work Test Paper 1 Aptitude Time and Work Test Paper 2 Aptitude Time and Work Test Paper 3 Aptitude Time and Work Test Paper 4 Aptitude Time and Work Test Paper 5 Aptitude Time and Work Test Paper 6 Aptitude Time and Work Test Paper 8 Aptitude Time and Work Test Paper 9 Time and Work Concepts
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