Two tunnels and wide are connected with each other at the right angel see Figure. Workers carry tu...: ответ на тест 861033 - Математика

Two tunnels  and  wide are connected with each other at the right angel (see Figure). Workers carry tubes of different length along these tunnels. Indicate in meters the greater length of the tube which can be carried along these tunnels in horizontal position.  (ignore the thickness of the tube).

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Channel Tunnel
The construction of the Channel Tunnel, also called the Euro Tunnel or Chunnel, is one of the  26______ technological and engineering feats of the 20th century.
In 1986, after almost 200 years of debate and planning (the idea of an undersea tunnel linking Britain with France was first 27______ in talks with Napoleon), the governments of both countries finally 28_____ to start construction and signed a treaty.
Engineers 29_____  a huge challenge. Not only would they have to build one of the longest tunnels in the world; they would have to convince the public that passengers would be 30_____ in a tunnel this size. Tunnel fires were common at this time. How did the engineers 31_____ this problem? They built an escape route.
The Channel Tunnel, actually consists 32_____ three tunnels. In between the two full-sized train tunnels there is a smaller service tunnel that can be used as an emergency escape route. There are connections between 33____ and the train tunnels every 375 meters. Just one year after the Chunnel opened, this engineering design was put to the test. Thirty-one people were trapped in a fire that broke out in a train 34_____ from France. The design worked. Everyone was able 35____ through the service tunnel.

10 吨的货物正装在数量不明的箱子里。每一个箱子的重量不超过1吨。积载量3吨的卡车最少几个次数可以保证把全部货物拉走?

西尔弗船长把一堆珍寶藏了在一个荒岛上。这个荒岛上只有两棵椰子树：小树距离大树400米。西尔弗告诉其它海盗小树和珍寶之间的距离是大树和珍寶之间距离的三倍。
若L -是海盗为了能够发现珍寶而挖掘沟道的最大长度，那么式的数值为…

Учащиеся восьмых классов общей численностью 128 человек в сопровождении трех классных руководителей планируют совершить
автобусную экскурсию. В каждом автобусе 27 посадочных мест. Сколько
автобусов нужно заказать для этих целей?

Бабушка с внуком решили посетить музей. Билет для взрослого стоит 80 рублей, для школьника билет на 40% дешевле. Внук предложил взять с собой друзей. У бабушки было 250 рублей. Скольких друзей они могут взять с собой?