Correct Answer - Option 2 : 50 kmph
Given
Total distance of journey = 450 kms
Formula used
Average speed = Total Distance/Total time
Calculation
Average speed = [450/{(300/60) + (150/37.5)}]
⇒ 450/(5 + 4) = 50 km/hr
∴ The average speed of man is 50 km/hr