Two cars A and B are 324 away from each other and coming towards each other. The speed of car A is 5 m/s more than that of car B. If they crossed each other in 12 seconds, then find in what time car B will cross a 198 m long tunnel.
a) 8 seconds
b) 12 seconds
c) 14 seconds
d) 18 seconds
e) 16 seconds
Sol:
Let the speed of car B = ‘x’ m/s
So, speed of car A = (x + 5) m/s
From the question:
(x + 5) + x = 324/12
x = 11
Speed of car B = 11 m/s
So, the time taken by car B to cross a 198 m
long tunnel = 198/11 = 18 seconds
