close
A balloon is rising vertically above a level straight road at a constant rate of 1ft/sec. Just when the balloon is 65ft above the ground, a bicycle moving at a constant rate of 17 ft/sec passes under it. How fast is the distance between the bicycle and balloon increseaing 3 sec later ?
arrow
arrow
    全站熱搜

    travelbased 發表在 痞客邦 留言(3) 人氣()

    E-mail轉寄