In the flow ofa viscous liquid over a flat horizontal surface, the velocity is 0.25 cm/sec at 20 mm distance above the flat surface at rest. What is the velocity gradient

In the flow ofa viscous liquid over a flat horizontal surface, the vel

1.	In the flow ofa viscous liquid over a flat horizontal surface, the velocity is 0.25 cm/sec at 20 mm distance above the flat surface at rest. What is the velocity gradient
Answer» 0.0625 /sec 0.125 /sec 0.25 /sec 0375 sec Answer :B