Maths?

jlzk SG

Whats the formula for a external surface of a tin ?
Is there any other formulas that is vital to know for O and N lvl?Kindly make a list that you think that is so.Thanks.

Darkness_hacker99 SG

External surface area of a tin.

2 * pi * r * h

Must find the circumference of the tin, this will be the length if you see it as a sheet.

Then multiply by the height. This will give you the external surface area of the tin.

Darkness_hacker99 SG

Please correct me if I am wrong.

Internal surface area of a tin = External surface area of a tin.

ditzy SG

Then what if the tin has a thickness of t? Laughing

ditzy SG

How about the round surfaces on the top and bottom? Laughing

jlzk SG

Er…i though is 2(pie)(r)(h) +2 (pie)(r^2)

Darkness_hacker99 SG

plus another

2 * pi * r^2

Darkness_hacker99 SG

If got thickness best, can calculate more accurately.

But TS question is quite general, haven't reach the industry level leh.

ditzy SG

Or it could be (h/4)(pi)(d^2) + (pi)(d^2)/2? Laughing

Darkness_hacker99 SG

Surprised

ditzy SG

Normally when its indicated as tin, t is taken to be negligeble. Laughing