First transmission: 2KB
Second Transmission: 4KB
Third transmission: 8KB
Fourth transmission: 16 KB
Fifth transmission: 20 KB [ Threshold reached]
Sixth transmission: 22 KB
Seventh transmission: 24 KB [ Timeout occurs, new th = 24 / 2 = 12 KB]
Eighth transmission: 2 KB
Ninth transmission: 4 KB
Tenth transmission: 8 KB
Eleventh Transmission: 12 KB [ Th reached]
Twelfth transmission: 14 KB
Thirteenth transmission: 16
Fourteenth transmission: 18 KB
Fifteen transmission: 20 KB
So 8RTT after timeout.
=> 8 x 12 = 96 msec