Question

Find the surface area
A hemisphere with diameter 70 cm

Answer 1

SA of whole sphere = 4π(35)^2 = 4900π

so half of that is 2450π cm^2

Answer 2

here we are given diameter = 70
first of all we find radius = 70/2 = 35
now we apply the formula to find hemisphere
if it is open like a bowl then curved surface area 2Π r^2

surface area 2* 22/7* (35)^2 = 7700 cm^2

If it is a closed hemisphere
then surface area = 3 *22/7* (35)^2= 11550 cm^2

Answer 3

The figure is= a hemisphere
The diameter is= 70
Half the diameter is= 70/2~ 35

If it is a closed hemisphere:
S.A.= 3(3.14)(35)^2
S.A.=3(3.14)(1,225)
S.A.=3,675(3.14)
S.A.=11,539.5~ round up to
S.A.=11,540

Answer 4

A hemisphere with diameter 70cm

Answer 5

A hemisphere with diameter 70 cm

Answer 6

65