Tolong dijawab pakai cara

150 x 6 = 900 cm
136 x 3 = 408 cm
143 x 2 = 286 cm
120 x 6 = 720 cm
125 x 4 = 500 cm

= 900 + 408 + 286 + 720 + 500
= 2120 + 694 = 2814 ÷ 21 = 134cm (A)