A cuboid has a volume of 40 cm³, length of 8 cm and height of 2 cm. Calculate the width (y) in cm.

The volume $V$ of a cuboid is given by the product of its length, width, and height.

$$V = l \times w \times h$$

We are given $V = 40 \text{ cm}^3$, length $l = 8 \text{ cm}$, height $h = 2 \text{ cm}$, and the unknown width $w = y \text{ cm}$.

$$40 \text{ cm}^3 = 8 \text{ cm} \times y \text{ cm} \times 2 \text{ cm}$$

Divide both sides by 16.

$$y = \frac{40}{16}$$ $$y = \frac{5}{2}$$ $$y = 2.5$$

The value of $y$ is $2.5 \text{ cm}$.

$$y = 2.5 \text{ cm}$$