Question

How much gift wrapper will be used in wrapping a box which is 12cm long, 9 cm wide and 7 cm high?

a. 510cm
b. 500cm
c. 255cm
d. 250cm

Answer 1

Answer:

Answer is option (a)

Step-by-step explanation:

$total \: surface \: area \: of \: cuboid \: =2 (lb + bh + lh) \\ = 2(12 \times 9 + 9 \times 7 + 12 \times 7) \\ = 2(108 + 63 + 84) \\ = 2(255) \\ = 510cm$