Jawabanmu

2014-05-07T13:41:31+07:00
Diket :
p1 = p
p2 = 2p
t1 = t
t2 = 0,5t

Jawab : 
P1/P2  = (v1 x t1)/(v2 x t2)
p1 / 2p = v1. t / v2. 0,5t
1/2 = 2p/v
v = 4p 
jadi massa jenisnya 4 kali  <--

semoga membantu :)