# 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

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) $4\sqrt{3}s$