R. Gupta Solutions for Exercise 3: MULTIPLE CHOICE QUESTIONS

If A can complete a work in $30$ days and B can complete the same work in $25$ days, then in how many days will 'A' and 'B' together complete the work?

A man and a boy can complete digging in $40$ days. The ratio of their speed of digging is $8 : 5$. How many days the boys alone will take to do this work?

$104$ men are employed to complete a work in $56$ days working $8$ hours per day. After $30$ days. $\frac{2}{5}$th work is finished. How many more men should be employed to finish the remaining work within time working $9$ hours per day?

$5$ persons prepare an admission list in $8$ days working $7$ hours per day. If two more persons are included to finish the work in $4$ days, how much hours per day they should do the work?

A and B take $15$ days and $10$ days respectively to complete a job. Both of them together started the job, but after $2$ days B have to leave the job due to any reason and the remaining work was finished by A. In how many days the job was completed?

A work can be finished in $100$ days by some persons, but due to the absence of $10$ persons, the work is finished in $110$ days. How many persons were employed initially?

The efficiencies of two workmen A and B are in the ratio of $5 : 4$. If A can do a piece of work in $12$ hours, then B can do it in:

A pipe can fill a cistern in $12$ hours and another pipe can empty completely filled cistern in $18$ hours. If both the pipes are opened together, the cistern will be filled in: