Chapter Mock 7: Time and Work, Pipe and Cistern Questions
Browse questions from Chapter Mock 7: Time and Work, Pipe and Cistern. Each question has options and an explanation.
Questions — Page 1 of 2
- A can complete a work in $15$ days and B can complete it in $10$ days. In how many days can they complete it together?
- A pipe can fill a tank in $12$ hours while another empties it in $18$ hours. If both are opened together, the tank will fill in:
- If $3$ men can finish a job in $18$ days, then $9$ men will finish the same job in:
- A alone does a job in $24$ days and B alone in $8$ days. B is how many times as efficient as A?
- A leak empties $\frac1{20}$ of a tank in one hour, while a tap fills $\frac1{5}$ of the tank in one hour. The fraction filled in one hour when both operate is:
- A can finish a work in $12$ days and B in $18$ days. If they work together for $4$ days, what fraction of the work remains?
- Two pipes can fill a tank in $20$ hours and $30$ hours, while a drain can empty it in $60$ hours. If all three are opened together, the tank fills in:
- A is $50\%$ more efficient than B. If B takes $18$ days to complete a work, A will take:
- If $18$ boys can do a piece of work in $24$ days, then $27$ boys can do the same work in:
- If $10$ persons can do a job in $20$ days, then $20$ persons with twice the efficiency can do the same job in: