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Comprehension

Direction: Study the direction and answer the following questions.

Train Shatabadi Express of length 180 meters can cross a tree in 12 seconds. Another train August express of length 240 meters crosses the tree at the same time as the train Shatabadi. Both the trains entered a bridge of length 270 meters at the same time moving in opposite directions.


1. 15
2. 0
3. 5
4. 10
5. None of these

1 Answer

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Best answer
Correct Answer - Option 2 : 0

Given:

Length of Shatabdi Express = 180 meters

Time taken by Shatabdi Express to cross a tree = 12 seconds

Length of August Express = 240 meters

Time taken by August Express to cross the same tree = 12 seconds

Formula Used:

Speed = Distance/Time

Calculation:

Normal speed of Shatabdi Express (S) = 180/12 = 15 m/s

Similarly, Normal speed of August Express (A) = 240/20 = 20 m/s

Hence we obtain:

4S – 3A = (4 × 15) – (3 × 20) = 0 

∴ The required value of (4S – 3A) is 0

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