A person travels $600 k m$ by train at $80 k m / h r$ and $100 k m$ by car at $50 k m / h r$ . What is the average speed for the entire distance?

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Solution

average speed $= \frac{(t o t a l d i s t a n c e t r a v e l e d)}{(t o t a l t i m e t a k e n)}$

Given: first $600 k m$ traveled with $80 k m / h r$ speed and next $100 k m$ traveled with $50 k m / h r$ speed.

therefore total distance $= 700 k m$

total time taken $= \frac{600}{80} + \frac{100}{50} = 9.5$ hours

so average speed $= \frac{700}{9.5} = 73.6842105$ $k m / h r$

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A person travels 600 km by train at 80 km/hr and 100 km by car at 50 km/hr. What is the average speed for the entire distance?

average speed =(total distance traveled)(total time taken) Given: first 600km traveled with 80km/hr speed and next 100km traveled with 50km/hr speed.therefore total distance=700kmtotal time taken =60080+10050=9.5hoursso average speed =7009.5=73.6842105 km/hr

A person travels $600 k m$ by train at $80 k m / h r$ and $100 k m$ by car at $50 k m / h r$ . What is the average speed for the entire distance?