A cube, whose edge is 20 cm long, has circles on each of its faces painted black. What is
the total area of the unpainted surface of the cube, if the circles are of the largest possible areas?
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Answer :2086.28
Step-by-step explanation:
side of cube 20cm
diameter of painted circle 20cm
radius 10cm
area of circle πrsquare
22/7*10*10
=314.28(approx)cmsquare
surface area of cube 6 side square
6*20*20
=6*400
=2400cmsquare
area of unpainted surface 2400-314.28
=2086.28
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