A solid hemisphere has a radius of 7 cm. Find the total surface area.

Cymbal

1 year ago

Correct 🤲

lateefat saoban

9 years ago

its B not D

Arnoldnagi

9 years ago

Here is the correct explanation:

surface area of a hemisphere = 3πr2



π 22 while r = 7



solution=3 * π(22/7) * 49



461.8= 462

jhuwon

11 years ago

the total surface area of a hemisphere = 3 * pi * radius * radius

hencethe total surface area of a hemisphere of radius 7 cm

= 3 * ( 22 / 7 ) * 7 * 7

= 3 * 22 * 7

= 21 * 22

= 462 cm sq

Kingdiana

7 years ago

The TSA of a sphere is 3pie r 2

DesmondBuwaX

1 month ago

nice

daomigreat

1 year ago

How many formulas u want make I put for head

kingsley omunakwe

11 years ago

oh sorry dat is not d answer.

EmeritusT

9 years ago

The selected answer is wrong:

Curved surface area is 2πr^2 but total surface area is curved surface area + area of the top which is 2πr^2 + πr^2 = 3πr^2



Hence, here, the solution is 3*π*7^2 = 462cm^2



Curved surface area was solved for here

tundex4x4

13 years ago

TSA of an hemisphere=2nr + nr^2 =3nr^2

:- 3*22/7*7^2=461.814

so correct ans is B not D.