Question

internal diameter of a hemisphere cup is 7cm find its inner surface area​

Answer 1

the total surface area of a hemisphere whose radius is 7 cm is 462 cm sq.

Answer 2

Answer:

the total surface area of a hemisphere whose diameter is 7 cm is 11.54 cm sq.

Step-by-step explanation:

$surface \: area \: of \: hemispheric \: cup \: = 3\pi {r}^{2}$

where , r = radius of hemispheric cup

diameter = 7 cm ( given )

therefore ,

$radius \: = \frac{diameter}{2} = \frac{7}{2} cm$

hence , the surface area =

$3 \times \pi \times {( \frac{7}{2}) }^{2}$

$3 \times 3.14 \times \frac{7}{2} \times \frac{7}{2}$

$\: \frac{46.158}{2}$

$\: 11.5395 \: or \: 11.54 \: {cm}^{2}$