Understanding the utility of Projected curves feature and Revolved cut feature in Solidworks

Objective: https://drive.google.com/open?id=1gHkAyf8OQSUmXMd9InKkie9mOIRP_mcx https://drive.google.com/open?id=1vUwQOFr7qGk6e-NpvmItIEFNzDMGjkvV