For Example From the above image

Base 1 (B1​) = 8.00 m

Base 2 (B2​) = 4.00 m

Height of the trapezoid (h) = 3.00 m

Length of the prism (L) = 6.00 m

STEP -01 – Calculate the base Area

Base Area= (1/2) × (Base 1​+Base 2​) × Height

So, Base Area= (1/2) × (8 +4 ​) × 3 = 18.00 m2

STEP -02 – Volume of the Prism

Volume =Base Area × Height (Length of the Prism)

Base Area = 18m2, Length as per above image 6.00 m

so, Volume = 18 x 6 = 108.00 m3

The volume of the trapezoidal prism is 108.00 m³.