The regular

The regular quadrilateral pyramid has a volume of 24 dm3 and a height of 45 cm. Calculate its surface.

Correct answer:

S =  55.3954 dm2

Step-by-step explanation:

V=24 dm3 v=45 cm dm=45:10  dm=4.5 dm  V=31 S1 v  S1=3 V/v=3 24/4.5=16 dm2  a=S1=16=4 dm  h2=v2+(a/2)2=4.52+(4/2)24.9244 dm  S2=2a h2=24 4.9244=97 dm29.8489 dm2  S=S1+4 S2=16+4 9.8489=55.3954 dm2



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