The diagram illustrates part of the braking system of a motor car. The master cylinder and its piston are connected hydraulically to a slave cylinder and its piston. Slave cylinder To brake Cross-sectional area 9000 mm Hydraulic fluid Master cylinder Cross-sectional area 300 mm Thrust from foot pedal If the thrust on the piston in the master cylinder is 200 N, the thrust on the piston in the slave cylinder would be....