Benny can do a piece of work in 24 days. Chethan and David can do the same work individually in 36 and 48 days, respectively. All of them begin the work together. However, Benny leaves the work 4 days before the completion of work and Chethan leaves the work 10 days before the completion of the work. David worked till the end and completed the work. Find the number of days in which the work was completed.

A thief robs precious metals from a store which is 1150 m away from the police. The thief starts running at 6 km/h and the police starts chasing at 11 km/h at the same time. How much distance (in m) will the thief run before being caught?

The value of 1$\frac{3}{4}$ + 1$\frac{5}{7}$ ÷ 2$\frac{3}{7}$ × 2$\frac{3}{7}$ = ?

If the third proportional of 3x² and 4xy is 48, then find the positive value of y.