一艘轮船按北偏西30°方向以每小时30海里的速度从A处开始航行，此时灯塔M在轮船的北偏东45°方向上，经过40分钟后轮船到达B处，灯塔在轮船的东偏南15°方向上，则灯塔M到轮船起始位置A的距离是（）海_刷题宝

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一艘轮船按北偏西30°方向以每小时30海里的速度从A处开始航行，此时灯塔M在轮船的北偏东45°方向上，经过40分钟后轮船到达B处，灯塔在轮船的东偏南15°方向上，则灯塔M到轮船起始位置A的距离是（）海里。

A： $\frac{20 \sqrt{6}}{3}$

B： $20 \sqrt{6}$

C： $20 \sqrt{3}$

D： $\frac{20 \sqrt{3}}{3}$

上一题下一题 0.0难度选择题更新时间:2019-06-13 04:57:05

答案(点此获取答案解析）

A

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