Vector PYQ's | Leta ⃗=2i ̂-7j ̂+5k ̂,b ⃗=i ̂+k ̂ and c ⃗=i ̂+2j ̂-3k ̂ be three given vectors...
Channel: IMPETUS GURUKUL
Date: 2023-12-12

Leta ⃗=2i ̂-7j ̂+5k ̂,b ⃗=i ̂+k ̂ and c ⃗=i ̂+2j ̂-3k ̂ be three given vectors. If r ⃗is a vector such that r ⃗×a ⃗=c ⃗×a ⃗ and r ⃗∙b ⃗=0, then |r ⃗ | is equal to
(a) 11/7 √2 (b) 11/7  (c)√914/7  (d) 11/5 √2
Ans: a


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