How many hollow block can 1 50kg cement can fill?

The number of hollow blocks that can be filled with 1 bag (50 kg) of cement varies based on the size of the blocks and the mix ratio of the mortar. Generally, a 50 kg bag of cement can produce enough mortar to fill approximately 30 to 40 standard hollow blocks, assuming a typical mix. It's important to consider factors like water content and aggregate size, which can affect the final yield. Always consult specific guidelines for the materials you are using for the most accurate estimate.