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?

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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

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