Surface 67004

A block with a square base with an edge length of 4 dm has a surface area of ​​112 dm square. Find its height.

Correct answer:

c =  5 dm

Step-by-step explanation:

a=4 dm S=112 dm2  S1=a2=42=16 dm2  S = 2 S1 + S2  S2=S2 S1=1122 16=80 dm2  S2 = 4 a c  c=4 aS2=4 480=5 dm

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