It's 28000 feet my dear and the path is not straight up, it goes up and down. So if peaking it in total is almost 130 kms. The base camp is half distance of it which I did. To peak the Everest summit one needs years of training and also a very high level of physical fitness. It's not impossible but extremely challenging and then after the base camp to move up one also needs mountain climbing special skills with the tools, there is no clear path then