A missile is fired for maximum range at your town from a place $100\, km$ away from you. If the missile is first detected at its half way point, how much warning time will you have ? (Take $g = 10\, m/s ^2$) the maximum height of the missile is

  • A

    $2.5\times10^4\, m$

  • B

    $5.0\times10^4\, m$

  • C

    $7.5\times10^4\, m$

  • D

    $10^5\, m$

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