RRB NTPC Mains or Stage 2 Model Paper 1 with solutions

Question : 26 of 120

Marks: +1, -0

The surface area (in sq. cm.) of a sphere with radius 3.5 cm is : (Take p =

22/ 7

)

Solution:

(2) Surface area of sphere

= 4πr^2

=[4×22/7×3.5×3.5] sq.cm.

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