answer :
Front & back
explanation :
Area = lw
( length x width )
CORRECT
Front: 4 x 7 = 28
Back: 4 x 7 = 28
INCORRECT
Bottom: 7 x 9 = 63
Top: 7 x 9 = 63
Right: 4 x 9 = 36
Left: 4 x 9 = 36
