Time and Work

Practice time and work question – Rahul can finish one-fifth of his homework in one hour. Neha can finish three-seventh of her homework in one hour thirty minutes and Riya can finish three fourth of her homework in three hours thirty minutes. If all of them start their homework at 12.00 p.m. and can go to play as soon as they all finish their homework, when can they start to play, if they take a break at 3.30 p.m. for thirty minutes?

Practice time and work question – Jagdish can build a wall in 10 days. Narender can build the same wall in 12 days while Sumit takes 15 days to do the same job. Which two of them should be employed to finish the job in 6 days?

Practice time and work question – A content manager is working on an excel sheet. She has 6 columns in the sheet – A,B,C,D,E and F. She has to check that no two columns should have the same entry. She can check only 2 columns at a time. How many times will she have to repeat the comparing process to complete the process for the whole file?

Practice time and work question – If a task is to be completed in 10 days, 10 men or 12 women should be employed. If 15 men and 6 women are employed for the job, in how many days can the task be completed ?

Practice time and work question – Harish and Peter working separately can paint a building in 18 days and 24 days respectively. If they work for a day alternately, Harish beginning, in how many days, the painting work will be completed ?

Practice time and work question – 5 Women can paint a building in 30 working hours. After 16 hours work, 2 women decided to leave. How long will it take for the work to be finished ?

Practice time and work question – A can complete a piece of work in 4 days. B takes double the time taken by A, C takes double that of B, and D takes double that of C to complete the same task. They are paired in groups of two each. One pair takes two-thirds the time needed by the second pair to complete the work. Which is the first pair?

Practice time and work question – 3 boys can complete a work in 7 days. 1 boy can complete it in:

Practice time and work question – If 30 men working 7 hours a day can do a piece of work in 18 days. In how many days will 21 men working 8 hours a day do the same piece of work?

Practice time and work question – Agyan is twice as good a workman as Adroit. If they work together, a task is accomplished in 14 days. If Agyan is not well and Adroit does it alone, how much time would he require to complete the task?

Practice time and work question – A cheetah runs at a speed of 144 kmph. It covers a distance of 280 m in:

Practice time and work question – If 24 men working 7 hours a day can do a piece of work in 18 days. In how many days will 21 men working 8 hours a day do the same piece of work?

Practice time and work question – 3 boys can complete a work in 9 days. 1 boy can complete it in:

Practice time and work question – 4 boys can complete a work in 17 days. 1 boy can complete it in:

Practice time and work question – Two computers each produced 48000 public utility bills in a day. One computer printed bills at the rate of 9600 an hour and the other at the rate of 7800 an hour. When the first computer finished its run, how many bills did the other computer still have to print?