Question : A 120 𝑚 long train is moving in a direction with speed 20 𝑚/𝑠. A train 𝐵 moving with 30 𝑚/𝑠 in the opposite direction and 130 𝑚 long crosses the first train in a time
(A) 6 𝑠
(B) 36 𝑠
(C) 38 𝑠
(D) 5 s
Answer : option (D)
Solution :
A 120 𝑚 long train is moving in a direction with speed 20 𝑚/𝑠. A train 𝐵 moving with 30 𝑚/𝑠 in the
opposite direction and 130 𝑚 long crosses the first train in a time
with
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