Properties of Matter

Figure below shows a liquid being pushed out of the tube by a piston having area of cross section $2.0 \mathrm{~cm}^{2}. The area of cross section at the outlet is 10 \mathrm{~mm}^{2}. If the piston is pushed at a speed of 4 \mathrm{~cm} \mathrm{~s}^{-1}, the speed of outgoing fluid is __________ \mathrm{cm} \mathrm{s}^{-1}