64seconds
- ~- A! J+ \5 Z9 h0 Rtvb now,tvbnow,bttvb公仔箱論壇" R, ~8 K# p7 ?/ Q$ H8 o2 W0 Q
1 to 4 have 3floors = 48 sectvb now,tvbnow,bttvb B3 R$ ?3 a& X7 F6 o+ g# B2 I
avg. 48/3 = 16sec公仔箱論壇0 v3 U. C* U" E% M( \+ c" r( F1 S
$ \7 A8 X3 k$ s+ T0 Y! S4 to 8 have 4floors = 16x43 C- x' |" l% R! z, C
= 64secs |