If q 53 and p28 cm what is the length of r?

To find the length of ( r ), we need more information about the relationship between ( p ), ( q ), and ( r ). If ( r ) is part of a geometric figure or follows a specific formula involving ( p ) and ( q ), please provide that context. Without additional details, it's impossible to determine the length of ( r ) based solely on the given values of ( p ) and ( q ).