Question
If person 'A' can complete a task in 35 hours and person
'B' can complete the same task in 40 hours, how much time will it take for both 'A' and 'B' to complete 60% of the work when they work together?Solution
Let the total work = L.C.M of 35 and 40 = 280 units Then, efficiency of 'A' = 280 Γ· 35 = 8 units/hour Efficiency of 'B' = 280 Γ· 40 = 7 units/hour 60% of the work = 280 X 0.6 = 168 units Time taken by 'A' and 'B' working together to complete 60% of the work = 168 Γ· (7 + 8) = 11.2 hours
Pipe L can fill a pool in 30 hours and pipe M in 45 hours. If both the pipes are opened in an empty pool, how much time will they take to fill it?
Two pipes A and B are opened together to fill a tank. Both the pipes fill the tank in time βxβ. If A separately takes 8 minute more time than βxοΏ½...
The efficiencies of two inlet pipes, 'P' and 'Q', are in the ratio of 3:5, respectively. When both pipes are open together, the tank is filled in 16 hou...
Pipe A and Pipe B together can fill the tank in 20 hours. The capacity of the pipe A is 25% of the capacity of the pipe B. How much time will pipe B alo...
Two taps A and B can fill a cistern in 12 min and 16 min respectively. If both taps are opened together and at the end of 4 min, B tap is turned off, th...
Pipe A and Pipe B could fill a tank together in 30 hours and 20 hours respectively, while pipe C could empty it in 12 hours. If both inlet pipes are ope...
Pipe βAβ can fill a tank in 16 hours. Pipe βBβ is ____% as efficient as pipe βAβ. If both pipes are opened simultaneously, the tank will be ...
Pipe βAβ can fill a tank in 20 hours while pipe βBβ takes 32 hours to empty it. Pipe βAβ is opened alone when the tank was empty and after 1...
Two inlet pipes 'A' and 'B' can fill an empty tank in 24 minutes and 32 minutes, respectively. Another outlet pipe 'C' can empty the tank in 96 minutes....
Pipe ‘A’ and pipe ‘B’, together can fill 20% of a tank in 6 hours while pipe ‘C’ takes 36 hours to empty it. ...
