Cắt mặt phẳng xung quanh của một hình trụ dọc theo một đường sinh rồi trải ra trên một mặt phẳng ta được hình vuông có chu vi bằng $8\pi$ . Thể tích của khối trụ đã cho bằng

Chia sẻ

Một số câu hỏi khác có thể bạn quan tâm.

• Choose the best answer for the following sentence:

  He advised me ____________ the facts before I made a decision ____________ the job.
   

• Choose the best answer for the following sentence:

  They have _______________ they cannot find time _________________.
  
  

• Choose the best answer for the following sentence:

  There ___________ mutual understanding between friends.
  
  
  

• Choose the word that has the underlined part pronounced differently from the rest:

  machinery                 march                    cheerfully                  merchant

• Choose the best answer for the following sentence:

  The water was so polluted that the explorers could not drink it.

• Choose the best answer for the following sentence:

  His doctor advised him ____________, but he found it impossible ______________ his habit.
   

• Choose the best answer for the following sentence:

  Their company was made ___________ 100,000 USD in taxes.
   

• Choose the best answer for the following sentence:

  The Pikes has a painter ______________ all the windows of their house.
  
  

• Choose the best answer for the following sentence:

  They did not let us _____________ the lecture because we had not got a member card.
   

• Choose the best answer for the following sentence:

  He had spent ______________ that he was broke.