A motorcycle covered the first 60 km of its journey at an average speed of 40 km/h. The speed of the motorcycle for covering the rest of the journey, i.e. 90 km, was 45 km/h. During the whole journey, the overall average speed of the motorcycle was:

A motorcycle covered the first 60 km of its journey at an average speed of 40 km/h. The speed of the motorcycle for covering the rest of the journey, i.e. 90 km, was 45 km/h. During the whole journey, the overall average speed of the motorcycle was:
एक मोटरसाइकिल ने अपनी यात्रा के पहले 60 किमी की दूरी को 40 किमी/घंटा की औसत चाल से तय करती हैं।बाकी यात्रा, यानी 90 किमी,दूरी तय करने के लिए मोटरसाइकिल की चाल 45 किमी/घंटा थी। पूरी यात्रा के दौरान, मोटरसाइकिल की कुल औसत चाल कितनी थी?