Admission test for the degree course in medicine and surgery 2012-2013

Test ministeriali 2012-2013 in lingua inglese per l’accesso alla facoltà di Medicina e Chirurgia 2012-2013

Domanda 10 di 80

A regular train service operates between Jayford and Kayton, a 16 km journey which takes 19 minutes. The trains travel at a constant speed of 60 km per hour in both directions except through a tunnel, where they are limited to 20 km per hour. Trains travelling towards Kayton enter the tunnel 4 km after setting off from Jayford. How long is the tunnel?