An MRT tunnel is 418m long. Calculate the time it will take the 108-m long train , travelling at 72km/h to pass completely through the tunnel, leaving your answer in seconds
V = 72000m/3600s. = 20 m/s.
d = V*t = 418+108 = 526 m.
t = 526/V = 526/20 = 26.3 s.