Question

PLEASE HELP ASAP- WILL MARK BRAINLIEST

Answer 1

V1 = V2 + 18

V1 =

$3 \times 6 \times x$

V2 =

$\frac{4 \times 7 \times x}{2}$

Do the maths...

$3 \times 6 \times x = \frac{4 \times 7 \times x}{2} + 18$

$18x = 14x + 18$

$4x = 18$

$x = 4.5$

So

The volume of the rectangular prism is 81 cubic feet.

The volume of the triangular prism is 63 cubic feet.