You have:
Â
 A1= 0.15 m²
 A2=6.0 m²
 F1=130.0 N
Â
 To solve this problem you must use the pressure formula, as below:
Â
 P1=P2
 F1/A1=F2/A2
Â
 Then, you have:
Â
 m2=A2xF1/A1xg
Â
 g=9.81 m/s² (This is the acceleration of gravity)
Â
 When you substitute the values in m2=A2xF1/A1xg, you obtain:
Â
 m2=(0.60 m² x 130.0 N)/(0.15 m² x 9.81 m/s²)
Â
 The answer is:
Â
 m2=530 Kg