${}_{\text{B}\text{l}\text{o}\text{o}\text{d}}=1\mathrm{.}60k\frac{g}{m^3},P_1=1\mathrm{.}4{10}^{4}Pa$

$V_1=0\mathrm{.}4\frac{m}{s},d_1=2cm,d_2=30\%of{d}_1$

Figure $2$: Steaady$-$state blood flow through a constricted artery.

$1-$find the discharge $(Q)$

$2-$find pressure $2$ and calculate $p1-p2$

$3-$The percentage of difference between the two pressures $\%P$