Cuboid - edges

The cuboid has dimensions in a ratio of 4:3:5. The shortest edge is 12 cm long. Find:
The lengths of the remaining edges
The surface of the cuboid
The volume of the cuboid

Correct answer:

a =  16 cm
c =  20 cm
S =  1504 cm2
V =  3840 cm3

Step-by-step explanation:

b=12 k=b/3=12/3=4 a=4 k=4 4=16 cm
c=5 k=5 4=20 cm
S=2 (a b+b c+a c)=2 (16 12+12 20+16 20)=1504 cm2
V=a b c=16 12 20=3840 cm3

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