A car has a master cylinder of area 4.0cm2. Each front wheel cylinder has an area of 8.0cm2. The master cylinder is 0.30m below the front cylinders. Brake fluid density is 900kgm−3. If the driver pushes the master piston with a force of 200N, the force exerted on each front piston (ignore viscous losses) is closest to
a) 8.0×102N
b) 4.0×102N
c) 1.0×102N
d) 2.0×102N