Math

Three circular pipes with 30cm diamters are strapped together. Find the length of the strap to the nearest centimeter.
I got the circumference of the circle which is 94.25cm but that's where i got stuck. Can you please help?

you are wrong sorry to tell ya.
the circumfrence of the circles is actually 47.2. you don't multiply pi by the diameter you multiply it by the radius or half the diameter. and the lenght of the strap depends on how they are strapped together but more than likely the answer is 94.2

Well it looks like this
___
/ \
/| |\
/__---__\
/ \ / \
(| | | |)
-----------

oops that didn't come out right
but it has one circle on top and 2 below with the belt around it

is it like
()()
() or is one on top and two on the bottom standing up you know like the game where you knock down the milk bottles

the belt covers 1/3 of each circle, so the circumference is part of the perimeter.

There are also three straight lengths, each one is equal to the distance between 2 of the centres.

Since the circumference of each is 30 cm.
2pi*r=30
r=15/pi

you should be able to take it from there

oops, even easier than I thought

30 is the diameter, so the radius is 15

.... easy question

one on top
two on bottom
....()
...()()

okay so i got the equations but then when you went back because you already know the raduis i got lost.

Draw yourself the picture.

The radius of the pipe is 15cm.

The total length of circular surfact to be wrapped is therefore C = Pi(30) = 94.2477cm.

The length of each straight portion of strap between tangency points is L = 2R = D = 30cm.

Thus, the total length of strap is 94.2477 + 3(30) = 184.25cm.

thanks soo much, you've been a great help!

yo wat is 5+5?

yo hi,do u play runescape?

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asked by Shay

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