Question

CANT GET WRONG

Kristen is wrapping presents for the holidays. She has a box that measures 4 ft. x 2 ft. x 2 ft. How many square feet of wrapping paper does she need to cover the box without overlapping?
A) 16 ft2
B) 40 ft2
C) 64 ft2
D) 96 cm2

Answer 1

we can either just mutiply them and add them
(area=legnth times width)
or we can use Surface Area formula (which can be found for only rectangular prisms)

SA=2(LW+LH+WH)

L=4
W=2
H=2
sub
SA=2(4*2+4*2+2*2)
SA=2(8+8+4)
SA=2(20)
SA=40

answer is 40 ft^2


aswer is B