Question

Help in this guys asap

Answer 1

Answer:

Option (c) 5

Explanation:

Since if you observe a and b vectors are coplanar and are in xy plane

Since a.n = 0 & b.n = 0

n is perpendicular to both a and b

Therefore n should be perpendicular to xy plane

n = k^

|c.n| = |(i+3j+5k).(k)| = 5

Note: even if you take n = - k, you'll get the same answer

Answer 2

Answer:

hey mate here is your answer

Explanation:

the correct option is (c) =5

hope it will help you please mark my answer as a brainliast.