## Speed Time And Distance

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 |

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