whongaliem
Jumlah seluruh kain = 4,2 m + 2 1/2 m + 3/4 m = 42/10 m + 5/2 m + 3/4 m = 84/20 m + 50/20 m + 15/20 m = 149/20 m kain yang digunakan = jumlah kain - sisa = 149/20 m - 0,7 m = 149/20 m - 14/20 m = 135/20 m = 27/4 m = 6 3/4 m ........jawaban B
= 42/10 m + 5/2 m + 3/4 m
= 84/20 m + 50/20 m + 15/20 m
= 149/20 m
kain yang digunakan = jumlah kain - sisa
= 149/20 m - 0,7 m
= 149/20 m - 14/20 m
= 135/20 m = 27/4 m = 6 3/4 m ........jawaban B