If \[{{(\mathbf{a}\times \mathbf{b})}^{2}}+{{(\mathbf{a}\,\,.\,\,\mathbf{b})}^{2}}=144\] and \[|\mathbf{a}|\,=4,\] then \[|\mathbf{b}|\,=\] [EAMCET 1994]

If \[{{(\mathbf{a}\times \mathbf{b})}^{2}}+{{(\mathbf{a}\,\,.\,\,\math

1.	If \[{{(\mathbf{a}\times \mathbf{b})}^{2}}+{{(\mathbf{a}\,\,.\,\,\mathbf{b})}^{2}}=144\] and \[\|\mathbf{a}\|\,=4,\] then \[\|\mathbf{b}\|\,=\] [EAMCET 1994]
A.	16
B.	8
C.	3
D.	12
Answer» D. 12

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If \[{{(\mathbf{a}\times \mathbf{b})}^{2}}+{{(\mathbf{a}\,\,.\,\,\mathbf{b})}^{2}}=144\] and \[|\mathbf{a}|\,=4,\] then \[|\mathbf{b}|\,=\] [EAMCET 1994]

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