1,278
160cm3.
1 cu cm = 0.001 l = 1/1000 l = 1 ml
9=l in a gb
A = w*l so 184 = w*23 or w = 184/23 = 8 cm
-3.5
1000 cu cm = 1 l → 1500 cc = 1500 ÷ 1000 l = 1.5 l
L = 9 w = 9
The rectangle is 99 cm2 in area. Here's how we got it. The rectangle has length (l) and width (w). A length and a length and a width and a width all added up equals 40 cm. And l is 2 cm longer than w, so l = w + 2. If we add w + 2 and w + 2 (the two lengths) and w and w, we get 40 cm. That's 4w + 4 cm = 40 cm. 4w = 36 cm, and w = 9 cm. The width is 9 cm, and the length is 2 cm more or 11 cm. The rectangle is 9 cm by 11 cm, and its area is 9 x 11 cm2, or 99 cm2.
15
1000 mL = 1 L so 9000 mL = 9 L. Simple enough for you, I hope!
It is impossible to say. Let L be ANY number such that 4.5 ≤ L < 9 cm and let B = (9 - L) cm. Then for every one of the infinite number of values of L, there will be a different rectangle whose perimeter will be 18 cm.