Question 150804
A rectangular solid has 2 lengths, 2 widths, & 2 heights right?
So each faces are covered then- surface area.
The length & width meet twice, length & height meet twice, and width and height meets twice too. In eqn,
{{{A=2LW+2LH+2WH}}}
{{{A=2(10)(6)+2(10)(5)+2(6)(5)}}}
{{{A=120+100+60}}}
{{{A=280 sq units}}}
Thank you,
Jojo