Answers

2016-02-06T08:20:07+05:30
50+50+50=150kms
so the bike travels 150 kms of distance
1 1 1
2016-02-06T08:47:35+05:30
The answer is 
he travels 50km with the motor cycle first.
then the life of both the tires will be finished.
he cannot use the 3rd tire because the motor cyle wont balance on it .
hence,he can travel only 50km.

hope it helps and pls mark this as best answer :)
1 5 1