On parallel lines, two goods trains, each 500 metres long, are travelling in opposing directions. Their respective top speeds are 45 km/hr and 30 km/hr. Calculate the time it takes the slower train to pass the faster train's driver.
A. 12 sec
B. 24 sec
C. 48 sec
D. 60 sec
Answer:B
On parallel lines, two goods trains, each 500 metres long, are travelling in opposing directions. Their respective top speeds are 45 km/hr and 30 km/hr. Calculate the time it takes the slower train to pass the faster train's driver.
A. 12 sec B. 24 sec C. 48 sec D. 60 sec
Explanation: 75 x 5/18 ) m/sec = relative speed = (45 + 30) km/hr= ( 125/6 ) m/sec. We need to calculate the time it takes the slower train to pass the faster train's DRIVER, not the entire train.As a result, the distance travelled equals the length of the slower train.As a result, the distance covered is 500 metres.As a result, the required time is ( 500 x 6) = 24 seconds.