Latest TCS Aptitude Question SOLUTION: Ahollow cube of size 5 cm is taken with a thickness of 1 cm. it is made of smaller cubes of size 1 cm. if 3 faces of the outer surface of the cube are painted totally how many face

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Ahollow cube of size 5 cm is taken with a thickness of 1 cm. it is made of smaller cubes of size 1 cm. if 3 faces of the outer surface of the cube are painted totally how many faces of the smaller cubes remain unpainted?
525
900
825
513

Asked In TCS Aashu (12 years ago)

Solved Priyanka Read Solution (2)

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RIJO ROY  (12 years ago)

totally 513 sides remain unpainted.
there are totally 98 small cubes and therefore 588 sides and if 75 sides are painted there will be 513 sides remain unpainted

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Priyanka  (12 years ago)

No. of small cubes required to make the bigger cube= (5*5*5-(5-2)*(5-2)*(5-2))/1*1*1 = 98
Small cubes surfaces on one side of bigger cube= 5*5= 25
Total no of sides of small cubes= 98*6 = 588
But 3 faces of the outer surface are painted i.e. 3*25= 75 surfaces of smaller cube are painted already
So remaining surfaces to be painted are= 588-75=513

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