On a two-lane car A is travelling with a...

On a two-lane car A is travelling with a speed of 36 `"km.h"^(-1)` . Two cars B and C approach car A in opposite directions with a speed of 54 `"km.h"^(-1)` each. At a certain instant when the distance AB is equal to AC both being 1 km, B decides to overtake A before C does. What minimum acceleration of car B is required to avoid an accident?

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The correct Answer is:

1 `"m.s"^(-2)`

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