Помогите с задачей! Собственная скорость лодки 12 км в час. Скорость течения реки 2,5 км в час. Какое расстояние больше и на ск

<span><span><span><span><span><span>A</span><span>B</span><span>=</span><span>A</span><span>C</span><span>c</span><span>o</span><span>s</span><span><span><span><span>30</span></span><span><span>0</span></span></span></span><span>=</span><span><span><span><span><span>3</span></span></span><span><span>√</span></span></span></span><span><span><span>/</span></span></span><span>2</span><span>,</span><span>B</span><span>C</span><span>=</span><span>A</span><span>C</span><span>s</span><span>i</span><span>n</span><span><span><span><span>30</span></span><span><span>0</span></span></span></span><span>=</span><span>1</span><span><span><span>/</span></span></span><span>2</span><span>,</span><span>B</span><span>D</span><span>=</span><span><span><span><span><span>A</span><span>B</span><span>⋅</span><span>B</span><span>C</span></span></span><span><span><span>A</span><span>C</span></span></span></span></span><span>=</span><span><span><span><span><span>3</span></span></span><span><span>√</span></span></span></span><span><span><span>/</span></span></span><span>4</span></span></span></span></span></span>

без всяких решений и вычислений понятно что нет...