No 13 gmn. Pake cara om.

R = 3 N
(R+10) + (N+10)= 48
(3N+10)+(N+10)=48
4N =28, umur Nina= 7th

[tex]2648 \times \frac{7}{2} \sqrt{51} [/tex]
8x=4.sin
sin/x=8/4
six=2
6=2
=6/2
=3
.
[tex] \gamma [/tex]