SOLUTION: a car travels certain distance at a speed of 30 km/h and returns with a speed of 10 m/s .calculate the average speed of the car .

Algebra ->  Customizable Word Problem Solvers  -> Travel -> SOLUTION: a car travels certain distance at a speed of 30 km/h and returns with a speed of 10 m/s .calculate the average speed of the car .      Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

Question 875502: a car travels certain distance at a speed of 30 km/h and returns with a speed of 10 m/s .calculate the average speed of the car .
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Convert to the same units and take the average.
30km%2Fhr*1000m%2Fkm*1%2F3600hr%2Fsec=25%2F3m%2Fs
V=%2825%2F3%2B10%29%2F2
V=%2825%2F3%2B30%2F3%29%2F2
V=55%2F6m%2Fs