Two balls X and Y are thrown from top of tower one vertically upward and other vertically downward with same speed. If times taken by them to reach the ground are 6 s and 2 s respectively, then the height of the tower and initial speed of each ball are (g=10m/s2)
A 60 m, 15 m/s
B 80 m, 20 m/s
C 60 m, 20 m/s
D 45 m, 10 m/s
