GOING         r             ()          d
RETRG         v             ()          d
Total                       t


r=40,v=45,t=4
unknown variables: d

GOING         r             d/r          d
RETRG         v             d/v          d
Total                       t

Let distance, one-way, be D

Then time taken to travel on 1st trip: 

Time taken to travel on 2nd trip: 

Since round-trip took 4 hours, then we can say that:



 -------- Multiplying by LCD, 360

17D = 1,440

D, or distance = , or  miles 

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