Answer:
It will 1.5 hours to Becky and Don to meet each.
Step-by-step explanation:
Let the time at which Becky and Don will meet be t.
Speed of Becky =60 mile/hr
Distance covered by Becky in t time ,x= 
Speed of Don = 80 mile/hr
Distance covered by Don in t time , y= 
Distance between both of them of 210 miles.




It will 1.5 hours to Becky and Don to meet each.