Question

Q11.Two trains 128 meters and 122 meters long are running towards each other on parallel lines at 48 kmph and 42kmph respectively. In what time will they clear off each other from the moment they meet?

Answer 1

Answer:

when the speed decrease

Step-by-step explanation:

of 2nd train 1st train runs high speed compare to 2nd train of 6kmph high per hour so,when they increase their speed at 14kmph they will clear of each other

Answer 2

The time taken is 2.78 hours.

Step-by-step explanation:

Since we have given that

Length of first train = 128 m

Length of second train = 122 m

So, total length of trains = $128+122=250\ m$

Speed of first train = 48 kmph

Speed of second train = 42 kmph

Since thy are running towards each other.

So, Relative speed = $48+42=90\ kmph$

Total length = $128+122=250\ m$

So, the time would be

$\dfrac{Distance}{time}=\dfrac{250}{90}=2.78\ hours$

Hence, the time taken is 2.78 hours.

# learn more:

Two trains 128 m and 122 m long are running towards each other on parallel tracks at 48 km/h and 42 km/h respectively. In what time will they clear off each other from the moment they meet?

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