Prism - box

The prism's base is a rectangle with a side of 7.5 cm and 12.5 cm diagonal. The volume of the prism is V = 0.9 dm3. Calculate the surface of the prism.

Correct answer:

S =  570 cm2

Step-by-step explanation:

a=7.5 cm u=12.5 cm  V=0.9 dm3 cm3=0.9 1000  cm3=900 cm3  b=u2a2=12.527.52=10 cm c=V/(a b)=900/(7.5 10)=12 cm  S=2 (a b+b c+a c)=2 (7.5 10+10 12+7.5 12)=570 cm2

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