The area of a parallelogram is 162sq m and its altitude is twice the corresponding base. Then the length of the base is?  Choose the correct choice.
A) 8  B) 9  C) 7  D) 6  E) 5
2x * x = 162 =&gt; x= 9   Answer: 9
<result>B</result>
The area of a parallelogram is 162sq m and its altitude is twice the corresponding base. Then the length of the base is?