Question

i) 1 = 42 cm, b = 2 dm, h = 1.5 dm
find thr surface area of a cuboid with above dimensions​

Answer 1

Answer:

3540 cm^2

Step-by-step explanation:

l = 42cm

b= 2 dm = 2x10 cm = 20cm

h = 1.5dm = 1.5x10 cm = 15cm

Surface area = 2lb + 2lh + 2bh

= 2 x 42 x 20 + 2 x 42 x 15 + 2 x 20 x 15 cm^2

= 1680 + 1260 + 600 cm^2

= 3540 cm^2