A person traveled 3 equal distances 4km/hr, 5km/hr, 6km/hr then find its avg speed? Choose the correct option
A) 5.2km/hr  B) 3.18km/hr  C) 4.86km/hr  D) 2.16km/hr  E) 6.32km/hr
avg speed = 3xyz/(xy+yz+zx)   required answer is = 3*4*5*6/ (20+30+24) = 4.86km/hr   Answer is 4.86km/hr
<result>C</result>
A person traveled 3 equal distances 4km/hr, 5km/hr, 6km/hr then find its avg speed?