Let r cm be the radius of the total sphere.
Then it's surface area would be 4πr2 cm2
This surface area is given as 120 cm2.
we can equate the two:
⇒ = 30
Curved surface area of a hemisphere
Base area =
So total surface area of a hemisphere = 2 + = 3
Substitute value from (1)
So total surface area of each hemisphere
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The surface areaKerala Board Mathematics Part-2