Question

total surface area of an hemisphere is 462. find its volume
​

Answer 1

Answer:

Total surface area of the hemisphere =462cm

2

Total surface area of the hemisphere =2πr

2

⇒462=3πr

2

⇒r=7 cm

Volume of hemisphere =

3

2

πr

3

V=

3

2

×

7

22

×7

3

V=718.67cm

3

Explanation:

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Answer 2

Answer:

781.67 cm³

Explanation:

TSA of hemisphere = 2πr²+πr²

= 3πr²

3πr²= 462

3 x 22\7 x r²

cancel 22 and 462 (you'll get 27)

cancel 3 and 27 (you'll get 7)

=> r = 7

Vol.of hemisphere = 2\3πr³

= 2\3 x 22\7 x 7 x 7

cancel 7 and 7

= 49\3 x 49

= 781.67cm³