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A man goes on a solo journey of 450 kms. He covers the first 300 at the speeds of 60 kmph and the remaining distance at 37.50 kmph. Find the average speed of the journey.
1. 60 kmph
2. 50 kmph
3. 40 kmph
4. 80 kmph

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Best answer
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 

 

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