a rectangular piece of paper of width 30cm and length 77cm is rolled along its width, to form a cylinder. What is the volume of the cylinder so formed?
Answers
Answered by
28
After rolled to cylinder
Height of cylinder = 77 cm
The width of rectangle becomes the circumference of cylinder
⇒ 2πr = 30
r = 30/2π = 30*7/22*2 {taking π = 22/7}
r = 210/44 cm = 4.77 cm
Volume of cylinder = πr²h = 22/7*4.77*4.77*77 = 5506.20 cm³
Height of cylinder = 77 cm
The width of rectangle becomes the circumference of cylinder
⇒ 2πr = 30
r = 30/2π = 30*7/22*2 {taking π = 22/7}
r = 210/44 cm = 4.77 cm
Volume of cylinder = πr²h = 22/7*4.77*4.77*77 = 5506.20 cm³
Anonymous:
u have to take length as height
this is not wrong
I'm sure my answer is right because I checked it on internet also
same answer as me
my teacher had given me the half solution .firstly i didn't get the ans that's why i send the que
even if u have doubt check it on internet
ok i will check. just wait
completed aa
all are getting different answers.
oh
Answered by
8
width of rectngle will become diameter of the cylinder = 30cm
lenght of rectangle will become height of cylinder =77 cm
radius of cylinder=d/2=30/2=15 cm
Now,
volume of cylinder=
=22/7×15×15×77
=54450cm^3
lenght of rectangle will become height of cylinder =77 cm
radius of cylinder=d/2=30/2=15 cm
Now,
volume of cylinder=
=22/7×15×15×77
=54450cm^3
this is also wrong ans
how
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