Peter takes the underground train to work and uses an escalator at the railway station. If Peter runs up 7 steps of the escalator, then it takes him 27.0 seconds to reach the top of the escalator. If he runs up 14 steps of the escalator, then it takes him only 16.5 seconds to reach the top. How many seconds would it take Peter to reach the top if he did not run up any steps of the escalator at all?   Hint Hint