RRB NTPC Mains or Stage 2 Model Paper 2 with solutions

Question : 71 of 120

Marks: +1, -0

The surface area (in sq. cm) of a sphere with radius 2 cm is: (Take p =

22/ 7

)

Solution:

(d) Here, r = 2 cm
Surface area of sphere

=4πr^ 2= 4× 22/7× 2× 2 =352/7 cm^2

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