Question

Please help me thanks!

Answer 1

3ft x 6ft= 9ft

9ft x 2= 18ft

20ft x 3ft= 60ft

60ft x 2= 120ft

20ft x 6ft= 120ft

120ft x 2= 240ft

240ft + 120ft + 18ft= 378ft

The surface area of the rectangular prisim is
`378ft^(2)`