Question 808759
D/f = 4
D/4 = f
D/r = 7
D/7 = r
f = r + 165
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D/4 = D/7 + 165
(7/28)D = (4/28)D + 165
(3/28)D = 165
D = 1540 miles
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Answer:
outbound = 1540/4 = 385 mph
inbound = 1540/7 = 220 mph
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