Question

if the TSA of a solid hemisphere is 2772cm square then find its total surface area

Answer 1

Answer:

Step-by-step explanation:

So the c.s.a. of hemisphere= 2772cm^2...so 2πr^2=2772 =>2*22/7*r^2 =2772 => 44/7 *r^2 =2772 => r^2 = 2772*7/44 => r^2 = 441 =>r =21cm..so total surface area of the solid => 3πr^2 = 3*22/7*21*21 =4158cm^2

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Answer 2

TSA of a cylinder =3πr^2
3x22/7xr^2=2772.
66/7xr^2=2772.
r^2=2772/66/7.
r^2=294.
r=17.14
2772 is TSA of a hemisphere..
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