\(150cm=1,5m;60cm=0,6m;70cm=0,7m\)
\(\left\{{}\begin{matrix}p=dh=10000\cdot1,5=15000\left(\dfrac{N}{m^2}\right)\\p'=dh'=10000\cdot\left(1,5-0,6\right)=9000\left(\dfrac{N}{m^2}\right)\\p''=dh''=10000\cdot0,7=7000\left(\dfrac{N}{m^2}\right)\end{matrix}\right.\)