AP EAPCET 19-Aug-2021 Shift 2 Paper

Let‌AB=a

^

i

+b

^

j

+i

^

k

a,b and c are projections of AB on x,y and z respectively
Projection of AB on xy-plane
=√a2+b2=√15
Projection of AB on yz-plane
=√b2+c2=√46
Projection of AB on zx-plane
=√c2+a2=7
∴a2+b2=15,b2+c2=46,c2+a2=49
On solving a=3,b=√6,c=√40
Projection of AB on Y-axis =b=√6
no option matches