RRB Junior Engineer Stage 1 Model Papers 9

Question : 25 of 100

Marks: +1, -0

If the diameter of a sphere is 14 cm, then what is the surface area (in

cm^2

) of the sphere?

Solution:

Diameter of sphere = 14 cm
∴ radius

=14/2=7 \cm

∴ Surface area of sphere

=4πr^2

=4×22/7×7×7=616 \cm^2

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