Numerical Appli...

A train of 320 m cross a platform in 24 seconds at the speed of 120 km/h. while a man cross same platform in 4 minute.What is the speed of man in m/s?.

A carpenter was hired to build 192 window frames. The first day he made five frames and each day, thereafter he made two more frames than he made the day before.How many days did it take him to finish the job?.

A,  B, and C together can finish a place of work in 12 days. A and C together work twice as much as B, A and B together work thrice as much as C. In what time ( day ) could each do it separately

Pipe A can fill a tank in $$10h$$ and pipe $$B$$ can fill the same tank in $$12h$$. Both the pipes are opened to fill the tank and after $$3h$$ pipe $$A$$ is closed. Pipe $$B$$ will fill the remaining part of the tank in

$$A,B$$ and $$c$$ can do a piece of work in $$24,30$$ and $$40$$ days respectively. The began the work together but $$C$$ left the work four days before the completion of the work. The work was completed in

$$150$$ workers were engaged to finish piece of work in a certain number of day. Four workers dropped the second day, four more workers dropped the third day and so on, it take $$8$$ more days to finish the work now. Then the number of days in which the work was completed is

Find the average of the following set of scores $$253,124,255,534,836,375,101,443,760$$

The number of permutations of letters of the word "PARALLAL" atken four at a time must be, 

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

Six people are going to sit in a row on a bench. $$A$$ and $$B$$ are adjacent, $$C$$ does not want to sit adjacent to $$D.E$$ and $$F$$ can sit anywhere. Number of ways in which these six people can be seated is