Question

Find the surface area of a rectangular prism with length 7 m, width 5 m, and height 3 m.

Answer 1

Answer: The surface area is 142m^2

Step-by-step explanation:

-The formula:

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

-Solve:

$A =$ $2$ $(5$ × $7$$)$ $+2$ $(3$ × $7)$ $+ 2$ $(3$ × $5)$

$A = 10$ × $7 + 6$ × $7 + 6$ × $5$

$A = 70 + 6$ × $7 +6$ × $5$

$A = 70 + 42 +6$ × $5$

$A = 112 + 6$ × $5$

$A = 112 +30$

$A = 142$

Therefore, the surface area of a rectangular prism is $142 m ^2$.

Answer 2

Answer:

142 meters

Step-by-step explanation:

As= 2(lw+lh+wh)