Diameter of plunger, d = 3 cm, Diameter of ram, D = 20 cm, Force required at the plunger = ?, Weight = 30 kN According to pascals law, Pressure applied at ram = Pressure exerted on the plunger
F1
A1
=
F2
A2
30000
Ï€D2
4
=
F2
Ï€d2
4
∴F2=
d2
D2
×30000=
32
202
×30000=675kN Here, F2= force required on the plunger