P can do work in 12 hr, Q in 6 hr. Together they must do double the work. Time required?

100 men have provisions for 26 days. If 50 men have left, for how many days the same provisions would last for the remaining men?

10 skilled persons can complete a work in 8 days and 10 semi-skilled persons take 12
days to complete the work. How many days will 4 skilled persons and 6 semi-skilled persons together take to complete the work?

A tank can be filled by one pipe in 8 hours and emptied by another pipe in 12 hours. How long will it take to fill the tank if both pipes are opened together?

In how much time a monkey will touch the top of a pillar whose height is 60 feet if he jumps 3 feet in a second and immediately slips 2 feet ?

Jyoti takes 30 minutes to type an application at the speed of 48 words per minute. If her speed is 45 words per minute, the time taken by her to type the same application will be

'A' can do a piece of work in 30 days and ' B ' alone can do it in 20 days. They work together for 4 days and then ' B ' leaves the job. 'A' will finish the remaining work in

A certain number of men can do a work in 60 days. If there were 8 men more it could have finished in 10 days less. How many men were there?

Rishi can finish $$\frac{1}{4}^{th}$$​ of a certain work in 26 days. Rakesh can finish $$\frac{9}{20}^{th}$$​ of the same work in 18 days. Rustum can finish 2/3 of the same work in 48 days. Who will complete the work first?

A can finish a piece of work in 36 days and B in 72 days. They begin the work together, but A leaves 6 days before the completion of the work. In how many total days the complete work will be done?

A is twice as efficient as B. Together, they can complete a task in 12 days. How many days will A alone take to complete the task?