Jawabanmu

2014-06-11T07:31:20+07:00
P=100/f 25=100/f f=100/25= 4 1/f=1/s + 1/s' 1/4=1/20 + 1/s' 1/4 - 1/20=1/s' 5-1/20 = 1/s' 4/20=1/s' 20/4=s' 5=s' s/s'=h/h' 20/5=3/h' 20h'=15 h'=15/20=3/4=7,5 insya' jwbnx spt it. mhn d cek kmbl :-)