Find the curved surface area and the total su | vedclass

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Question

(A) Given diameter $d = 2.8\,m$,so the radius $r = d/2 = 1.4\,m$.The curved surface area $(CSA)$ of a hemisphere is given by $2\pi r^2$.$CSA = 2 	ime

Vedclass · Accepted Answer

$12.32\,m^2, 18.48\,m^2$

Vedclass · Answer

(A) Given diameter $d = 2.8\,m$,so the radius $r = d/2 = 1.4\,m$.The curved surface area $(CSA)$ of a hemisphere is given by $2\pi r^2$.$CSA = 2 	imes (22/7) 	imes (1.4)^2 = 2 	imes (22/7) 	imes 1.96 = 2 	imes 22 	imes 0.28 = 12.32\,m^2$.The total surface area $(TSA)$ of a hemisphere is given by $3\pi r^2$.$TSA = 3 	imes (22/7) 	imes (1.4)^2 = 3 	imes (22/7) 	imes 1.96 = 3 	imes 22 	imes 0.28 = 18.48\,m^2$.Thus,the curved surface area is $12.32\,m^2$ and the total surface area is $18.48\,m^2$.

Find the curved surface area and the total surface area of a hemisphere with a diameter of $2.8\,m$.

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