Tolong dijawab ya kakak
10) sisa = 3,5 – (1¼ + ⅔)
= 7/2 – (5/4 + ⅔)
= 42/12 – (15/12 + 8/12)
= (42-23)/12
= 19/12
= 1 5/12
11) t = 3,5 = 7/2 jam
kecepatan = 200 km ÷ 7/2
= 200 x 2/7
= 400/7
= 57 km/jam
15)
108.000 dm³/jam
= 108.000/3.600 x 1.000
= 30.000 ml/detik