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A person travels 600km by train at 80 km...

A person travels 600km by train at 80 km/hr, 800km by ship at 40km/hr 500km by aeroplane at 400km/hr and 100km by car at 50km/hr. What is the average speed for the entire distance ?

A

60 `"km"//"hr"`

B

`60 (5)/(12) "km"//"hr"`

C

62 `"km"//"hr"`

D

None of these

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The correct Answer is:
D
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MAHENDRA-SPEED, TIME AND DISTANCE-EXERCISE
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  8. Mac travels from A to B a distance of 250 miles in 5 1/2 hours. He ret...

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  10. The average speed of a train in the onward journey is 25 % more than t...

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  11. I started on my bicycle at 7 a.m. to reach a certain place. After goin...

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  12. A, B and C are on a trip by car. A drives during the first hour at an ...

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  13. A boy rides his bicycle 10 km at an average speed of 12 "km"//"hr" and...

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  14. A person travels 600km by train at 80 km/hr, 800km by ship at 40km/hr ...

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  15. A car travels the first one-third of a certain distance with a speed o...

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  16. A train when moves at an average speed of 40 kmph, reaches its destina...

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  17. If a train runs at 40 km/hour, it reaches its destination late by 11 m...

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  18. A man covers a certain distance on scooter. Had he moved 3 km/ faster,...

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  19. A car covers a distance of 715 km at a constant speed. If the speed of...

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  20. In covering a certain distance, the speed of A and B are in the ratio ...

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