tolong bantu jawab nomor 6, thanks

[ Keliling ABCD = 2x + 2x + AD + BC ]

AD = 45/360 . 22/7 . d
AD = 1/8 . 22/7 . 2x
AD = 11/14x

BC = 45/360 . 22/7 . d
BC = 1/8 . 22/7 . 6x
BC = 33/14x

K = 2x + 2x + AD + BC
4x + 11/14x + 33/14x = 175
4x + 44/14x = 175
28/7x + 22/7x = 175
50/7x = 175
x = 175 x 7/50
x = 1225 / 50
x = 24,5

AB = 2x
AB = 2 (24,5)
AB = 49 cm