Function word problem 2?

Question

109. You commute to work a distance of 40 miles and return on the same route at the end of each day. Your average rate on the return trip is 30 miles per hour faster than your average rate on the outgoing trip. Write the total time, T, in hours, devoted to your outgoing and return trip, x. then find and interpret. T(30).

Answer 1

T(x) = 40/(x) + 40/(x+30)

T(30) = 40/30 + 30/60 = 1.33 + 0.5 = 1.83 hours