Answer:
16 cm
Step-by-step explanation:
1.6 m = 160 cm
Model length = 160 / 10 = 16 cm
160 cm
1 : 10
1.6 : x
Cross multiply.
1 × x = 10 × 1.6
x = 160
43
Let's call this number x. The word sum means addition, so we can write x + 21 = 64. When we subtract 21 from both sides, we get x = 43. Hope this helps!