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Delhi University MCA Previous Year Questions (PYQs)
Delhi University MCA Train PYQ
Delhi University MCA PYQ
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Delhi University MCA Previous Year PYQDelhi University MCA DU MCA 2020 PYQ
Two trains each 500 metres long, are running in opposite directions on
parallel tracks. If their speeds are 50 km/hr and 40 km/hr respectively, the
time taken by the slower train to pass the driver of the faster one is _______seconds
Go to Discussion
Delhi University MCA Previous Year PYQDelhi University MCA DU MCA 2020 PYQ
Solution
Relative speed = (50 + 40) km/hr=($90\times\frac{5}{18}$)m/sec
=25 m/sec.
We have to find the time taken by the slower train to pass the Driver of the faster train and not the complete train.
So, distance covered = Length of the slower train.
Therefore, Distance covered = 500 m.
∴ Required time ($500×\frac{1}{25}$)=20sec.
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