Mohon bntuannya (3A)..
Jawaban Terkonfirmasi
diketahui : x1 = 10 ; x2 = 40
y1 = 40 ; y2 = 10
A1 = 80 .20 ; A2 = 40 . 20
= 1600 = 800
ditanya : x (titik berat)
xo = (x1 .A1 + x2 .A2) / (A1 + A2)
= (10 .1600 + 40 .800) / (1600 + 800)
= (16.000 + 32.000) / 2400
= (160 + 320) / 24
= 480 / 24
= 20
yo = (y1 .A1 + y2 .A2) / (A1 + A2)
= (40 .1600 + 10 . 800) / (2400)
= (64.000 + 8000) / 2400
= (640 + 80) / 24
= 720 / 24
= 30
jadi titik berat X = ( 20 , 30)