Question

the radius of a sphere whose volume is 38808 cu.cm.

Answer 1

Answer:

volume of sphere = 4/3 pi. r^3

38808 = 4/3 x 22/7 x r^3

11 x 3528 = 4/3 x 22/7 x r^3

3528 =4/3 x 2/7 x r^3

4 x 882 = 4/3 x 2/7 x r^3

882 = 2/21 x r^3

r^3 = 882 x 21 /2 = 441 x 21

= 21 x 21 x 21

hence ,

r = 21 cm

now,

surface area = 4 pi. r^2

= 4 x 22/7 x 21 x 21

= 4 x 22 x 3 x21

= 88 x 63 =5544 cm^2

Step-by-step explanation:

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Answer 2

Step-by-step explanation:

volume =38808 cm³

4/3πr³=38808

r³=38808x3x7/22x4

r³=814968/88

r³=9261

r=21cm