Train A running at 81 km/h takes 72 sec to overtake train B, when bot…

Question

Train A running at 81 km/h takes 72 sec to overtake train B, when both the trains are running in the same direction, but it takes 36 sec to cross each other if the trains are running in the opposite direction. If the le…

Accepted Answer

Option B. 480. Answer & Solution Answer: Option B Solution: & A + 600 = ( 81 - s ) × 518 × 72 . . . . . ( i ) & A + 600 = ( 81 + s ) × 518 × 36 . . . . . ( ii ) & From equation ( i ) and ( ii ) & ( 81 - s ) × 518 × 72 = ( 81 + s ) × 518 × 36 & ( 81 - s ) × 2 = ( 81 + s ) × 1 & 162 - 2s = 81 +…

Train A running at 81 km/h takes 72 sec to overtake train B, when both the trains are running in the same direction, but it takes 36 sec to cross each other if the trains are running in the opposite direction. If the length of train B is 600 metres, then find the length of train A. (in metres)

Solution