What is the average number of employees in departments a, D and F

In 2014, there were 25% post-graduate employees in department B. In 2015, 22 employees of the same deparment were shifted to Branch ‘PQR’ . If in 2015, the percentage of post-graduate employees in department B became 28%, how many post-graduate employees were shifted to branch ‘PQR’

In 2014, the number of female employees in Department C was 5/13 of the total number of employees in same department. If the number of female employees in department F was 4 less than that in department C, what is the number of male employees in department F

The distance between two places- A and B is 110 km. 1^st car departs from place A to B, at a speed of 40 km/h at 11 a.m., 2^nd car departs from place B to A at a speed of 50 km/h at 1 p.m. At what time will both the cars meet each other 

√? = (1248.28+51.7) ÷ 99.9-7.98

√1024.002÷3.996÷9.98÷29=?