Quadrilateral 6542

Calculate the surface of a quadrilateral prism two dm high, the base of which is: a square with a side of 15cm.

Correct answer:

S =  16.5 dm2

Step-by-step explanation:

a=15 cm dm=15:10  dm=1.5 dm c=2 dm S1=a2=1.52=49=2.25 dm2  S2=4 a c=4 1.5 2=12 dm2  S=2 S1+S2=2 2.25+12=16.5 dm2

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