The back of a 400-meter long train traveling at 60 kilometers per hour exits a tunnel exactly 3 minutes after the nose of the train enters the tunnel. How long is the tunnel?
+36916 In 3 minutes the train travels the lenth of the tunnel + 400 m ( the length of the train)
60 km/hr = 1 km/ min
1 km/min * 3 min = 3 km so the tunnel is 3 km - 400 m = 2.6 km long
