Let the total work be 120 unit (LCM of 24, 15 and 20)
So, the efficiency of A + B = 5 unit/day
The efficiency of B + C = 8 unit/day
The efficiency of A + C = 6 unit/day
The efficiency of A + B + C = (5+8+6)/2 = 19/2 unit/day
So, the efficiency of B =19/2 -6 = 7/2 unit/day
Let the time taken by B to complete the remaining work be x days.
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60 Mins English English35 Questions35 Marks20 Mins English English120 Questions120 Marks90 Mins EnglishTwo pipes, P and Q, together can fill a tank in 5 hours. If pipe P alone can fill the tank in 10 hours, then how much time (in hours) will pipe Q alone take to fill the tank?
25 persons, each working 10 hours a day, can complete 2 units of work in 4 days. How many days will it take for 10 persons working 9 hours a day to complete 18 units of work?
8 men and 3 women can do a piece of work in 7 days, whereas 5 men and 1 woman can do it in 12 days. How many men should assist 8 women so that the same work is completed in days?
A work can be completed by x persons in 50 days. Due to absence of 5 persons, the work was completed in 55 days. The value of x is
Pipes A and B can fill a tank in 12 hours and 18 hours, respectively. Pipe C is an emptying pipe. When all the three pipes are opened together for 8 hours, then 26/45 part of the tank is filled up. What part of the tank will be filled up by A and C together in 9 hours?
P can do work in 12 hr, Q in 6 hr. Together they must do double the work. Time required?
Pipe A can fill a tank in 13 hours, pipe B can fill the same tank in 26 hours and pipe C can fill the same tank in 17 hours. The time taken by them to fill the same tank if they operate together is:
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