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272) The sum of the volumes is minimal

273) The sum of the volumes is maximum

And the answer are 272 = 1 and 273 = infinit

Ok

Vs = 4pir

^{3}/3 and Vc = l

^{3}

since diameter = R/2

V= 4piL/8

^{3}/3

THen

V= PiL

^{3}/6

I sum and Got V= PiL

^{3}/6 +L

^{3}

surfaces

cube = L

^{2}and Sphere Pi(L/2)

^{2}

When derive I got 0 and i can not get the answers