A man covers one – third of the certain journey at the rate of 30 km/hr. one fourth of the journey at the rate of 60 km/hr and remaining at the rate of 45 km/hr. What is the average speed of man in the whole journey?
1
\(25\frac{{36}}{{53}}\)
2
\(36\frac{{40}}{{53}}\)
3
\(40\frac{{40}}{{53}}\)
4
\(45\frac{{36}}{{53}}\)