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Vol. Of hemisphere is 2425.5cm^3. Find …

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Vol. Of hemisphere is 2425.5cm^3. Find its CSA.(use π=22/7)

Posted by Kshitij Prakash 6 years, 11 months ago

CBSE > Class 10 > Mathematics

2 answers

Gaurav Seth 6 years, 11 months ago

Given : Volume of hemisphere = 2425.5 cm³
Volume of hemisphere = 2/3πr³
2425.5 = 2/3*22/7*r³
r³ = (2425.5*21)/44
r³ = 50935.5/44
r³ = 1157.625
r = 10.5 cm
Now,
Curved Surface Area of hemisphere = 2πr²
= 2*22/7*10.5*10.5
= 693 cm²
CSA of hemisphere is 693 cm²

0Thank You

Anushka Jugran ? 6 years, 11 months ago

U can first find the radius of hemisphere as the volume is already given and after finding the radius, u can find its csa

1Thank You

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