A) \[23\frac{1}{3}\,\,km/h\]
B) \[53\frac{1}{3}\,\,km/h\]
C) 67 km/h
D) 73 km/h
Correct Answer: B
Solution :
[b] Total distance covered = 300 + 500 = 800 km. Total time taken to cover 800 km \[=\frac{300}{45}+\frac{500}{60}=\frac{20}{3}+\frac{25}{3}=\frac{45}{3}=15\,hr.\] \[\therefore \] \[Average\,\,speed=\frac{800}{15}=\frac{160}{3}=53\frac{1}{3}kmph\]You need to login to perform this action.
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