Question : A train of length 342 m is running at 54 km/hr. In how much time (in seconds) will it cross a bridge of length 438 m?
Option 1: 48
Option 2: 50
Option 3: 54
Option 4: 52
Answer (1)
24th Jan, 2024
Correct Answer: 52
Solution :
Given: Speed of train = 54 km/hr
= $54 \times \frac{5}{18}$ = 15 m/s
Length of bridge = 438 m
Total distance = train length + bridge length
Total length = 342 + 438 = 780
So, the required time = $\frac{780}{15}$ = 52 sec
Hence, the correct answer is 52.
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