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​If the radius of a sphere is 7 cm, then the surface area in (cm2) of 
Question

If the radius of a sphere is 7 cm, then the surface area in (cm2) of the sphere is ____.\text{If the radius of a sphere is 7 cm, then the surface area in (cm}^2\text{) of the sphere is \_\_\_\_.}

(Take π=227)\left(\text{Take } \pi = \frac{22}{7}\right)​​

A.

616


B.

729


C.

243


D.

343

Correct option is A

Given:

Radius of sphere= 7cm

Formula Used:

Surface are of sphere = 4π(r2)4\pi (r^2)​​

Solution:

Surface are of sphere = 4π((7)2)4\pi ((7)^2)​​

= 4×227×494 \times \frac{22}{7} \times 49​​

616cm2 616cm^2​​

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