Prism - box

The base of prism 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 result:

S =  570 cm2

Solution:

a=7.5 u=12.5 V=0.9 103=900 b=u2a2=12.527.52=10 c=V/(a b)=900/(7.5 10)=12 S=2 (a b+b c+a c)=2 (7.5 10+10 12+7.5 12)=570 cm2



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