Posted by **DestinyLashea** on Tuesday, May 10, 2011 at 2:29pm.

Find the surface area of the closed rectangular box shown

6cm, 5cm, 3cm

S.A.= (LW)+2(HL)+2(HW)

I did: (5x6)+2(5x3)+2(6x3)=96 am I correct?

- Essential Mathematics 2 -
**MathMate**, Tuesday, May 10, 2011 at 4:01pm
6cm, 5cm, 3cm

This formula for the surface area is for an *open* box with length L and width W:

S.A.(open)= (LW)+2(HL)+2(HW)

For a closed box, it would be:

S.A.(closed)= 2(LW+HL+HW)

You would do: **2**(5x6)+2(5x3)+2(6x3)=?

- Essential Mathematics 2 -
**DestinyLashea**, Tuesday, May 10, 2011 at 5:11pm
126. thanks

- Essential Mathematics 2 :) -
**MathMate**, Tuesday, May 10, 2011 at 5:16pm
You're welcome!

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