a,\(p=d\cdot h=10000\cdot0,25=2500\left(Pa\right)\)
b,\(p_A=d\cdot h_A=10000\cdot\left(0,25-0,07\right)=1800\left(Pa\right)\)
\(25cm=0,25m;7cm=0,07m\)
\(\left\{{}\begin{matrix}p_1=d.h_1=10000.0,25=2500\left(Pa\right)\\p_2=d.h_2=10000.\left(0,25-0,07\right)=1800\left(Pa\right)\end{matrix}\right.\)