22
Q:
A) 10 | B) 25 |
C) 12 | D) 20 |
Answer: C) 12
Explanation:
Explanation:
Speed of train 1 = = 12 m/sec
Speed of train 2 = = 8 m/sec
if they travel in opposite direction, relative speed = 12 + 8 = 20 m/sec
distance covered = 120 + 120 = 240 m
time = distance/speed = 240/20 = 12 sec