Question

S=2lw+2wh+2hl S=800 l=10 h=20
800=2(10w)+2w(20)+(2)(20)(10)
800=60w+400
400=60w
w = 6.6
is it right?

Answer 1

@5454354366464 Are you still here?

Answer 2

yes

Answer 3

Good
Equation=\[S=2(lw+wh+hl)\]\[S=800\]\[l=10\]\[w=w\]\[h=20\]
Sub values:
\[S=2(lw+wh+hl)\]\[800=2(10w+20w+20*10)\]\[800=2(10w+20w+200)\]\[800=20w+40w+400\]\[400=20w+40w\]\[400=60w\]\[w=\frac{400}{60}\]\[w=\frac{20}{3}\]\[w=6.666666...\]
So Yes, you were right :)

Answer 4

thanks'