A train travel some distance with speed 30 km/h and returns with speed of 45 km/h. calculate the average speed of train.
Give Answer In Full Step Or Method.
Answers
Answered by
7
for same distance travelled avg speed(<v>) is
ntimesdistance/<v>=1/v₁+1/v₂+1/v₃..................+1/Vn
Here;
2/<v>=1/30+1/45 ;here 2 bcoz train makes 2 trips
THEREfore <v>=(2*30*45)/(30+45)
=(60*45)/75
=36km/hr
ntimesdistance/<v>=1/v₁+1/v₂+1/v₃..................+1/Vn
Here;
2/<v>=1/30+1/45 ;here 2 bcoz train makes 2 trips
THEREfore <v>=(2*30*45)/(30+45)
=(60*45)/75
=36km/hr
Similar questions