a) 4 : 3
b) 3 : 5
c) 3 : 4
d) 50 : 3
Answer: c
Explanation: Speed of track = 550 per minute.
Speed of bus = $$\frac{{33\,{\text{kms}}}}{{45}}$$ = $$\frac{{33000}}{{45}}$$ = 733.33 m/minute
Ratio of their speeds = $$\frac{{550}}{{733.33}}$$ = 3 : 4
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