Question

Two trains of length 110 metres and 90 m are running on parallel lines in the same direction with a speed of 35 kmph and 40 kmph, respectively. In what time will they pass each other.

Answer 1

Answer:

$lenth \: of \: trains \: is \: 110 m \\ distance \: = 110 + 90 = 200m \\ speed \: of \: tarin \: in \: sam \: direction \: = 40 - 35 = 5kmph \\ then \: time \: = \frac{distnce}{speed} \\ time \: = \frac{200}{5} = 40sec$

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Answer 2

Answer:

0.04 hours

Step-by-step explanation:

Given : Two trains of length 110 metres and 90 m are running on parallel lines in the same direction with a speed of 35 kmph and 40 kmph, respectively.

To Find : In what time will they pass each other.

Solution:

Length of train 1 = 110 m = 0.11 km

Length of train 2 = 90 m =0.09 km

Total length = 0.11 km +0.09 km = 0.2 km

Speed of train 1 = 35 kmph

Speed of train 2 = 40 kmph

Relative speed = 40-35 = 5kmph

Time =$\frac{Distance}{Speed}$

Time will they pass each other =$\frac{0.2}{5}$

                                                   =0.04 hours

Hence  they will pass each other in 0.04 hours