If the volume of the parallelopiped with \(\vec a\times \vec b\), \(\vec b\times \vec c\) and \(\vec c\times \vec a\) as coterminous edges is 9 cu. units,then the volume of the parallelopiped with (\(\vec a\times \vec b\))×(\(\vec b\times \vec c\)), (\(\vec b\times \vec c\))×(\(\vec c\times \vec a\)) and (\(\vec c\times \vec a\))×(\(\vec a\times \vec b\)) as coterminous edges is
- 9 cu.units
- 729 cu.units
- 81 cu.units
- 243 cu.units
The Correct Option is C
Solution and Explanation
volume amounts to cubic units. Consequently, we can deduce that .
Now, considering the parallelepiped characterized by the edges and , its volume is given by the expression , and its numerical value is presented as:
Hence, the overall volume of this parallelepiped equates to 81 cubic units.
The correct answer is option (C): 81 cu.units
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Concepts Used:
Vector Algebra
A vector is an object which has both magnitudes and direction. It is usually represented by an arrow which shows the direction(→) and its length shows the magnitude. The arrow which indicates the vector has an arrowhead and its opposite end is the tail. It is denoted as
The magnitude of the vector is represented as |V|. Two vectors are said to be equal if they have equal magnitudes and equal direction.
Vector Algebra Operations:
Arithmetic operations such as addition, subtraction, multiplication on vectors. However, in the case of multiplication, vectors have two terminologies, such as dot product and cross product.