(continuation) 2:00p.m. At what time does the rear of the train emerge from the tunnel?
2007-01-17 12:49:32 · 3 answers · asked by Jose C 1 in Science & Mathematics ➔ Mathematics
The distance the train has to travel to clear the tunnel
=Length of the tunnel+its own length
=2+0.5km
=2.5 km
Time takem=2.5/50
=0.05 hr
=0.05X60 or 3 minutes
The train would emerge from the tunnel at 2-03 pm
2007-01-17 13:37:10 · answer #1 · answered by alpha 7 · 0⤊ 0⤋
The train needs to travel
2 + 1/2 = 5/2 miles from the time the front of the train enters the tunnel until the end of the train emerges from it.
time = distance/rate = (5/2 miles) / (50 miles/hr)
= 1/20 hour = 3 minutes
Time for the rear of the train to emerge from the tunnel is 2:03 pm.
2007-01-17 21:01:23 · answer #2 · answered by Northstar 7 · 0⤊ 0⤋
the back end of the train has to travel 2½ miles so 2½*60/50 = 3 minutes
2007-01-17 20:58:08 · answer #3 · answered by Ivanhoe Fats 6 · 0⤊ 0⤋