Question : If the vector A = 2î+ 4ĵand B⃗= 5î+ pĵ are parallel to each other, the magnitude of B is
(A) 5√5
(B) 10
(C) 15
(D) 2√5
Answer : option (A)
Solution :
If the vector A = 2î+ 4ĵand B⃗= 5î+ pĵ are parallel to each other, the magnitude of B is
with
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