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- A train travelling at a speed of 75 mph enters a tunnel 3 (1/2) miles long.
Question 1:
A train travelling at a speed of 75 mph enters a tunnel 3 (1/2) miles long. The train is 1/4 mile long. How long does it take for the train to pass through the tunnel from the moment the front enters to the moment the rear emerges? A. 3 min
Feedback Total distance covered = ( 7/2 + 1/4 ) miles
= 15/4 miles.
Therefore, Time taken
= ( 15 / 4 x 75 ) hrs
= 1 / 20 hrs
= ( 1/20 x 60 ) min.
= 3 min.
= 15/4 miles.
Therefore, Time taken
= ( 15 / 4 x 75 ) hrs
= 1 / 20 hrs
= ( 1/20 x 60 ) min.
= 3 min.
B. 2 min
C. 2.5 min
D. 4 min
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