Tim and his brother are building towers out of blocks. Tim is using blue blocks that are 6 cm tall and his brother is using gree
n blocks that are 8 cm tall. They both made towers the same height. What is the shortest possible height of the towers? How many of each color block did they use?
Total miles traveled in p hours = p*q miles and Total miles traveled in r hours = r*s miles so, average rate of speed = total miles traveled / number of hours =[{(p*q)+(r*s)} / (p+r)] miles per hour
