$\"\"$

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

From the diagram base of the rectangular prism is rectangle. So, use the area of the rectangle to find B.

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

$\"\"$ (Substitute 5 for l, 14 for b)

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

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

$\"\"$ (Substitute 70 for B, 210 for V)

$\"\"$ (Divide each side by 70)

$\"\"$ (Cancel common terms) \ \

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

The height of the rectangular prism is $\"\"$ cm.