Question

the total surface area of a hemisphere is 1039.5 cm2. Find its radius in (cm)

Answer 1

Answer:

We know,total surface area of a hemisphere =

$3 {\pi}^{2}$

So ,total surface area of a hemisphere =1039.5

=>

$3 {\pi}^{2} = 1039.5$

=>3×22/7 ×

${r}^{2}$=1039.5

r^2=110.25

=> r=10.5

therefore Diameter of the hemisphere =10.5×2=21cm