A person travels three equal distance at a speed of x km/hr, y km/hr and z km/hr respectively. What is the average speed for the whole journey ? Options: A . &nbsp$$\frac{{xyz}}{{3\left( {xy + yz + zx} \right)}}$$ km/hr B . &nbsp$$\frac{{xyz}}{{\left( {xy + yz + zx} \right)}}$$ km/hr C . &nbsp$$\frac{{\left( {xy + yz + zx} \right)}}{{xyz}}$$ km/hr D . &nbsp$$\frac{{3xyz}}{{\left( {xy + yz + zx} \right)}}$$ km/hr

A person travels three equal distance at a speed of x km/hr, y km/hr and z km/hr

Question

A person travels three equal distance at a speed of x km/hr, y km/hr and z km/hr respectively. What is the average speed for the whole journey ?

Options:

A . $$\frac{{xyz}}{{3\left( {xy + yz + zx} \right)}}$$ km/hr

B . $$\frac{{xyz}}{{\left( {xy + yz + zx} \right)}}$$ km/hr

C . $$\frac{{\left( {xy + yz + zx} \right)}}{{xyz}}$$ km/hr

D . $$\frac{{3xyz}}{{\left( {xy + yz + zx} \right)}}$$ km/hr

Answer: Option D

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