When blood flow changes a tube with cross-sectional area A₁ to cross-sectional area A₂, the blood velocity changes from V₁ to V₂, according to the following equation:
V₂/V₁ = A₁/A₂
Find the blood velocity V₁ that corresponds to a cross sectional area of 110 mm² if the blood velocity V₂ that corresponds to an area of 160 mm² is 67cm/sec

Hint: You should not need to do any geometry or unit conversion for this problem, but
do use appropriate significant digits and give units in your answer.