Question

A rectangular sheet of paper 30cm×18cm . can be transformed into the currved surface area of right circular cylinder in two ways i;e, either by rolling the paper along its length by rolling along its breadth. find the ratio of the volume of the two cylinders thus formed .

plz answer my question ​

Answer 1

Answer:

Step-by-step explanation:

Case1: when the sheet is folded along its length :

In this case, it forms a cylinder having height h1=18 cm and the circumference of its base equal to 30 cm.

Let the radius of its base be r1. Then,

2pi r1=30

r1=15/pi.

V1=pi r^2 h=pi*(15/pi)^2 cm3=4050/pi.cm3

Case.2

When the sheet folded along its breadth :

Heights h2=30cm and the circumference of its base equal to 18cm.

Let the radius be r2. Then,

2pi r2=18=(9/pi)

V2=pi r^2 h=(pi*(9/11)^2) cm^3 =2430/pi cm^3.

V1/v2=(4050/pi*pi/2430)=4050/2430=5/3

Ans.5:3.

Answer 2

Baat karni hai ki ni karni .....

karni ho to ...

come on my question ....