A person traveled 3 equal distances 20km/hr, 30km/hr, 60km/hr then find its avg speed?	Choose the correct choice from the following.
A) 20km/hr B) 30km/hr C) 22km/hr D) 19km/hr E) 31km/hr
avg speed = 3xyz/(xy+yz+zx)   required answer is = 3*20*30*60/ (600+1800+1200)= 
<gadget id="calculator">3*20*30*60/ (600+1800+1200)</gadget>
<output>30</output>
30km/hr   Answer is 30km/hr
<result>B</result>
A person traveled 3 equal distances 20km/hr, 30km/hr, 60km/hr then find its avg speed?