Question : Two trains each 50 𝑚 long are travelling in opposite direction with velocity 10 𝑚/𝑠 and 15 𝑚/𝑠. The time of crossing is

(A) 2𝑠

(B) 4𝑠

(C) 2\sqrt{3}s

(D) 4\sqrt{3}s

**Answer :** option (B)

**Solution :**

with
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Question : Two trains each 50 𝑚 long are travelling in opposite direction with velocity 10 𝑚/𝑠 and 15 𝑚/𝑠. The time of crossing is

(A) 2𝑠

(B) 4𝑠

(C) 2\sqrt{3}s

(D) 4\sqrt{3}s

**Answer :** option (B)

**Solution :**