A person travelled from his house to office at 30km/hr and office to house at 50km/hr. Then find the average speed? Choose the correct choice from the following options:
A) 37.5km/hr  B) 20km/hr  C) 32km/hr  D) 24km/hr  E) 25km/hr
37.5km/hrverage speed = (2*30*50)/(30+50)= 
<gadget id="calculator">(2*30*50)/(30+50)</gadget>
<output>75/2 = around 37.5</output>
37.5km/hr   37.5km/hrnswer is 37.5km/hr
<result>A</result>
A person travelled from his house to office at 30km/hr and office to house at 50km/hr. Then find the average speed?