Jawabanmu

2014-06-12T09:29:41+07:00
P = F/A
P = 40/(0,25 .10⁻⁶)
P = 160 000 000 Pa
2014-06-12T09:31:07+07:00
P = F/A = 40 N / 0,00025 m = 160.000 N/m