Question:
A train which is 1 km long travelling at a speed of 60 km/hr, enters a tunnel 2 km of length. What time does the train take to come fully out of the tunnel?
A4 min
B3 min
C5 min
D3 hours
Answer:
B. 3 min
Explanation:
3 min Distance = 1km+2km=3km (train+tunnel) speed =60km/hr Time =distance/speed = speed = 3/60 hr= 3/60*60 min=3 min