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Two boats are travelling at the speed of 36 km/hr and 54 km/hr respectively towards each other. What will be the distance between the two boats one second before they collide?
1. 10 metres
2. 35 metres
3. 25 metres
4. 15 metres

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Correct Answer - Option 3 : 25 metres

Given:

The speed of the first boat = 36 km/h

The speed of the second boat = 54 km/h

Formula used:

\(S\ =\ {D\over T}\)     (Where, S = The speed, D = The distance, and T = The time)

Calculation:

Let be assume they will collide in T time and the distance between them is D

⇒ The relative speed of both boats = 36 + 54 = 90 km/h = 90 × (5/18) = 25 m/s

⇒ Now, we can see that both boats will cover 25 m distance in a second then,

⇒ The required distance = 25 m

∴ The required result will be 25 m.

 The relative speed of the two trains when running opposite directions = The sum of the speed of the trains

The relative speed of the two trains when running the same direction = The difference in the speed of the trains

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