Question

What is the surface area of the rectangular prism with the width 18 1/2 ft, 4 5/6 ft and 5 1/3 ft?

Answer 1

Use the formula for the surface area of a rectangular prism:

$\sf A=2(wl+hl+hw)$

Plug in what we know:

$\sf A=2((18\dfrac{1}{2})(5\dfrac{1}{3})+(4\dfrac{5}{6})(5\dfrac{1}{3})+(4\dfrac{5}{6})(18\dfrac{1}{2}))$

Multiply:

$\sf A=2((98\dfrac{2}{3})+(25\dfrac{7}{9})+(89\dfrac{5}{12}))$

Add:

$\sf A=2(213\dfrac{31}{36})$

Multiply:

$\boxed{\sf A=427\dfrac{13}{18}~ft^2}$