Xavier Aptitude Test 2018 Paper

Question : 54 of 99

Marks: +1, -0

It takes 2 liters to paint the surface of a solid sphere. If this solid sphere is sliced into 4 identical pieces, how many liters will be required to paint all the surfaces of these 4 pieces.

2.2 liters
2.5 liters
3.0 liters
4.0 liters
None of the above

Validate

Solution:

Surface area of the sphere = 4

πr^2

Area of the new surfaces created when we cut the sphere in 4 equal parts = 4

πr^2

Hence total surface area = 4

πr^2

+ 4

πr^2

= 8

πr^2

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