A man travels 600 km by train at 80 km/hr, 800 km by ship at 40 km/hr, 500 km by

Question

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

Options:

A . $${\text{60 km/hr}}$$

B . $$60\frac{5}{123}{\text{ km/hr}}$$

C . $${\text{62 km/hr}}$$

D . $$65\frac{5}{123}{\text{ km/hr}}$$

Answer: Option D

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