Step-by-step explanation:

Given,

The altitude of a triangle(h) = 8 cm = 0.1 × 8 dm = 0.8 dm and

The area of a triangle = 0.48

To find, the base of a triangle(b) = ?

We know that,

The area of a triangle

⇒

⇒

⇒

⇒ b = 1.2 × 10 cm = 12 cm [ since, 1 dm = 10 cm]

Hence, the base of a triangle(b) = 12 cm or 1.2 dm