64seconds
3 T1 \7 _& W9 M: L0 ytvb now,tvbnow,bttvb5.39.217.77:88987 m6 Q% u+ }2 W# K
1 to 4 have 3floors = 48 sec
% p5 r$ y$ F% }8 aavg. 48/3 = 16sec
* I' A6 N4 n6 Y5 Z) k& l% G9 ~2 T
% B2 V" i+ e1 _! L- |4 to 8 have 4floors = 16x4tvb now,tvbnow,bttvb. K* n5 |+ F4 g% o+ C {' V
= 64secs |