Suppose a family drives at an average rat of 60mi/h on the way to visit relative

Question

Suppose a family drives at an average rat of 60mi/h on the way to visit relatives and then at an average of 40 mi/ h on the way back. The return trip takes 1 h longer than the trip there. 1. Let d be the distance in miles the family traveled to visit their relatives. How many hours did it take to drive there?
2.In terms of d, nhow many hours did it take to make the return trip? 3.Write and solve an equation to determine the distance the family drove to see their relatives. Whatwas the average rate for the entire trip?

Explanation / Answer

let time is to to go forward t = d/(60) backward take 1 hour more thus = 1+d/(40) d/60+1 = d/40 d(1/60-1/40) = -11 -1/d = 1/60-1/40 -1/d = 40-60/2400 = -20/2400 = -1/120 d = 120 miles thus ans

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