Question

the height of a cylinder is 6cm . the three times the sum of its two circular faces is equal to twice the total surface area . find the radius of the cylinder. ( kindly don't type irrelevant responses in the answer box )​

Answer 1

ᘜIᐯᗴᑎ :-

• Height of cylinder = 6cm.
• The three times the sum of the areas of its two circular faces is equal to twice the total surface area.

TO ᖴIᑎᗪ :-

• The radius of the cylinder.

ՏOᒪᑌTIOᑎ :-

We know :

❥︎ Area of circular face = 2πr^2

❥︎ Total surface area = 2πr(r+h)

Aᴄᴄᴏʀᴅɪɴɢ ᴛᴏ ǫᴜᴇsᴛɪᴏɴ :-

» 3(2πr^2) = 2[2πr(r+h)]

» 6πr^2 = 4πr^2 + 4πrh

» 2πr^2 = 2πrh

» r = h

Given that , h = 6cm.

Therefore,

❥︎ Rᴀᴅɪᴜs ᴏғ ᴄʏʟɪɴᴅᴇʀ = 6ᴄᴍ.

____________________

Answer 2

Nelson Mandela felt privilege to be the host to the nations of the world because not too long ago he hand all the other natives of South Africa were considered as outlaws see the stand all International leaders for having come to witnesses invitations as the President of South Africa this event could be considered as the common victory for justice and human dignity