The diagram shows a cuboid.
8 cm
15 cm
20 cm
What is the surface area of the cuboid?

surface area of the cuboid = 1160

Step-by-step explanation:

surface area of a cuboid = 2 ( lb + bh + lh )

( where, l = length, b = width, h = height )

so, surface area =

=》2 ( (8 × 15) + (15 × 20) + (20 × 8) )

=》2 ( 120 + 300 + 160 )

=》2 × 580

=》1160

so, surface area = 1160 sq.cm

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.

the answer is the third / last answer

step-by-step explanation: