Question

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?

• A. 5
• B. 8
• C. 7
• D. 10

Answer 1

Answer:

B. 8

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