Ans. To solve numerical problems related to fluid mechanics, you need to understand the basic principles and equations of fluid mechanics, such as Bernoulli's equation, Pascal's law, and Archimedes' principle. You should also be familiar with various properties of fluids, such as pressure, density, and viscosity. Practice solving different types of problems, including those involving fluid flow, buoyancy, and hydrostatics, to enhance your problem-solving skills in this subject.