The length of two trains are 130 m and 150 m are running at the speed of 52 km/hr and 74 km/hr, respectively on parallel tracks in opposite directions. In how many seconds will they cross each other?
A5
B8
C7
D10
Answer:
B. 8
Read Explanation:
Relative Speed = (52 + 74) km/hr
⇒ 126 km/hr
⇒ (126 × 5/18) m/sec
⇒ 35 m/sec
The distance covered to pass each other = (130 + 150) m
⇒ 280 m
time taken to pass each other = (Distance/Relative Speed)
⇒ 280/35
⇒ 8 seconds