**Question: **Four points A, B, C and D lie on a straight line in the X-Y plane, such that AB = BC = CD, and the length of AB is 1 metre. An ant at A wants to reach a sugar particle at D. But there are insect repellents kept at points B and C. the ant would not go within one metre of any insect repellent. The minimum distance in metres the ant must traverse to reach the sugar particle is

\(3\sqrt 2 \) | |

\(1 + \pi \) | |

\(\frac{{4\pi }}{3}\) | |

5 |

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