In a flow condition where both viscous and gravity forces dominate and both the Froude number and the Reynolds number are the same in model and prototype; and, the ratio of kinematic viscosity of model to that of the prototype is 0.0894.What is the model scale ?
a. 1 : 3.3 b. 3.3 :1
c. 5 : 1 d. 1 : 5