Here is a set of free short videos for stepwise preparation of Solids and Mensuration on GMAT. For a more detailed treatment of the topic, you may want to opt for our GMAT online course or our GMAT test series of 15 mock tests.
How to Find "Curved Surface" Area of Any Solid
How to Find "Total Surface" Area of Any Solid
How to Find the "Volume" of Any Solid
Properties of Sphere and Hemisphere
An Important Concept on Solids