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 ?

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

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

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

$\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 a

1.	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 ?
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» E.

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