Q2.What is the ratio of volumes of the two cylinders formed by rolling a sheet of dimensions lxb in two different ways? Q3.What is the height of a right circular cylinder made from a rectangular sheet of length 20cm and breadth 15cm if it’s rolled along its length? Q4.What is the curved surface area of a cylinder obtained by rolling a square along its 7cm long side? Q5.What is the ratio of the total surface area and the curved surface area of the cylinder?

2. b : l

3. 20cm

4. 49

5.

Step-by-step explanation:

Solution 2:

Let cylinder is rolled along 'l':

Height of cylinder , h = length of rectangle = l

Perimeter of base = b

Let 'r' be the radius of cylinder's base:

Volume of a cylinder is given as:

Putting the values:

Let cylinder is rolled along 'b':

Height of cylinder , h = length of rectangle = b

Perimeter of base = l

Let 'r' be the radius of cylinder's base:

Volume of a cylinder is given as:

Putting the values:

Taking ratio:

Solution 3:

Rectangle is rolled along its length to make a cylinder, so height will be equal to its length.

height of cylinder = 20 cm

Solution 4:

Side of square = 7 cm

Height of cylinder =Side of square = 7 cm

7 cm will be the circumference of the circle.

i.e. = 7 cm

Curved surface area of a cylinder:

Putting the above values:

CSA = 7 7 = 49

Solution 5:

As calculated in above step:

CSA = 7 7 = 49

Total surface area =

Calculating value of r:

= 7 cm

Total surface area =

Ratio of TSA: CSA is

the median here is 25. your lowest value is 14 and highest value is 48. to find the third quartile, find the medium number in between 25 and 48 which would be 42 i believe.