Piston of cross-section area 100 cm2 is used in a hydraulic press to exert a force of 107 dynes on the water. The cross-sectional area of the piston which support an object having a mass 2000 kg is \((g = 10 \,m/s ^2)\)
(1) 100 cm2
(2) 109 cm2
(3) 2 x 104 cm2
(4) 2 x 1010 cm2
