Find the magnitude of ( vec{a}+ vec{b} ), if ( vec{a} )=4 ( hat{i} ) – McqOptions

MCQOPTIONS

1.	Find the magnitude of ( vec{a}+ vec{b} ), if ( vec{a} )=4 ( hat{i} )+9 ( hat{j} ) and ( vec{b} )=6 ( hat{i} ).
A.	( sqrt{181} )
B.	( sqrt{81} )
C.	( sqrt{11} )
D.	( sqrt{60} )
Answer» B. ( sqrt{81} )

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