Ravi is standing at Lal Chowk facing towards East. He turns 90° towards his right and walks 'x' km to reach Shiv Mandir. Then he turns 90° towards his left and walks 3 km to reach Ganesh Chowk. The shortest distance between Lal Chowk and Ganesh Chowk is 5 km. What is the distance between Lal Chowk and Shiv Mandir?