Hello!
Answer:

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Step-by-step explanation:
We'll need the formula for the volume of a triangular prism to solve this. The formula is: b × h × l ÷ 2
This simply means that you have to multiply the base by the height and length, and divide all of that by 2.
Base = 10 cm
Height = 12 cm
Length = 50 cm
(I converted the 0.5 m to cm. It's 50 cm)
Substitute these values into the formula and solve:
v = 10 × 12 × 50 ÷ 2
v = 6,000 ÷ 2
v = 3,000 cm³
Have a fabulous day! :)