Question

a rectangular sheet of paper 11cm × 4 cm respectively is folded without everlapping to make a cylinder of height 4 cm find the volume of cylinder ​

Answer 1

Answer:

Step-by-step explanation:

length of rectangle=11cm

breadth=4cm

now, after folding

height=4cm

circumference of the base=11cm

we know that

circumference=2πr

11=2*22/7*r

r=11*7/22*2

r=7/4

volume of cylinder=πr²h

=22/7*(7/4)²*4

=22/7*7/4*7/4*4

=77/2cm³

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Answer 2

Answer: 77/2 cm^3

Solution:
Let x be the circumference of the top of the cylinder

11*4 cm^2= x*4 cm

(11*4 cm^2)/4 cm =x

x=11cm

Now, take r as the radius of the surface.

11cm = 2*22/7*r
r= (11*7)/22*2 cm

r=7/4

Now,Volume of cylinder.

=> 2*22/7*r*r*h

=> 2*22/7*7/4*7/4*4 cm^3

=> 77/2 cm^3


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