Athlete 2 ran the relay race for 55 + 10 = <<55+10=65>>65 seconds.
Athlete 3 ran for 65 - 15 = <<65-15=50>>50 seconds.
While athlete 4 finished the relay race for 55 - 25 = <<55-25=30>>30 seconds.
So,It take them 55 + 65 + 50 + 30 = <<55+65+50+30=200>>200 seconds to they finish the relay race.
#### 200