$\"\"$

The volume of the prism is $\"\"$

From the given data, bases of the prism are traingles. so, use the area of the triangle to find B.

Area of a triangle is $\"\"$ . So, $\"\"$ .

$\"\"$ (Substitute 7 for b 20 for h)

$\"\"$ (Multiply: $\"\"$ )

$\"\"$ (Divide: $\"\"$ ) $\"\"$

$\"\"$ (Apply Formula for volume of a prism)

$\"\"$ (Substitute 70 for B 10 for h)

$\"\"$ (Multiply: $\"\"$ ) $\"\"$

The volume of the prism is $\"\"$ .