A force F acts normally on two separate metal plates. Plate 1 has an area of 20cm2 while Plate 2 has an area of 40cm2. Which one of the following correctly compares the pressures P1 and P2 produced on the two plates?
(a) P1=P2
(b) P1=2P2
(c) P1=21P2
(d) P1=4P2