Question

111) Rupees
Q.18 Case study II
Folding of rectangular sheet
the three-dimensional shape of cylinder . The volume of this three-
dimensional shape can be determined by using the formula
Volume =rºh
Qing=8
BC
AD
U
8m
where ris
the radius
of cylinder and
0
B
10m
A
10m
h is the height
of the cylinder
T Toreh
२२ x
8
2
8m
AB
3
We have a rectangular sheet of paper whose area is determined by
using the formula, area of sheet= length X breath .Suppose we rolled
the sheet either along the length or along the breath then it becomes​

Answer 1

Answer:

Step-by-step explanation:

The ratio of their volumes of two cylinders is 5:3

Step-by-step explanation:

Given:- A rectangular Sheet of,

Length=30 cm, Breadth=18 cm.

To find:- Ratio of Volumes of two cylinders = ?

Solution:-

On rolling the paper along the length,

height (h)  of cylinder = 18 cm,

radius (r) of cylinder = 15 cm.

Now,

Volume of cylinder (V) =  

----------()

Volume of cylinder on rolling along length =  sqcm. --------(equation 1)

Now, on rolling paper along its breadth,

height (h) of cylinder = 30 cm,

radius (r) of cylinder = 9 cm.

Now,

Volume of cylinder (V) =  

--------()

Volume of cylinder on rolling along breadth =  sqcm. ---------(equation 2)

Now, from equation 1 and equation 2,

Therefore ratio of cylinder after rolling paper length wise and breadth wise is 5:3.