R S Aggarwal Solutions for Chapter: Time and Work, Exercise 2: EXERCISE

$A$ can do a piece of work in $15$ days. $B$ is $50\%$ more efficient than $A$. $B$ can finish it in

$A$ does $20\%$ less work than $B$. If $A$ can finish a piece of work in $7\frac{1}{2}$ hours, then $B$ can do that work in $k$hours. Find the value of $k$.

$A$ can do a piece of work in $20$ days which $B$ alone can do in $12$ days. $B$ worked at it for $9$ days. $A$ can finish the remaining work in

$A$ can do a piece of work in $25$ days, which $B$ alone can do in $20$ days. $A$ started the work and was joined by $B$ after $10$ days. The work lasted for

Two pipes can fill a tank in $20$ minutes and $30$ minutes respectively. If both the pipes are opened simultaneously, then the tank will be filled in

A tap can fill a cistern in $8$ hours and another tap can empty the full cistern in $16$ hours. If both the taps are open, the time taken to fill the cistern is 

A pump can fill a tank in $2$ hours. Due to a leak in the tank it takes $2\frac{1}{3}$hours to fill the tank. If the leak can empty the full tank in $k$ hours then find $k$.

Two pipes can fill a tank in $10$ hours and $12$ hours respectively, while a third pipe empties the full tank in $20$ hours. If all the three operate simultaneously, in how much time will the tank be full?