Question

a rectangular sheet of paper 44cm x 20cm , is ropped along its length to form a cylinder .Find the total a surface area of the cylinder thus genareted​

Answer 1

Step-by-step explanation:

Answer : 1188 cm²

Solution :

_________

Given that : A rectangular sheet of paper 44cm×20cm is rolled along its length.

Then, the circumference of the base of cylinder is equal to the length of rectangular sheet.

Now, according to the question :

2 X 22/7 X 7 X 27 = 1188cm

And the height of the cylinder will be the breadth of rectanglular sheet.

So, the height of the cylinder = 20 cm

Now, Total Surface Area of cylinder : 2πr(r+h)

Thus, the total surface area of cylinder will be 1188 cm²

Answer 2

Answer:

1188cm2

Step-by-step explanation:

Dimensions of rectangular sheet of paper = 44cm × 20cm When this sheet of paper is rolled along its length, Circumference of base becomes = 44 cm

By using the formula,

Circumference of base = 2πr So, 2πr = 44 2 × 22/7 × r

= 44 r = 44×7 / 44 = 7cm

Radius = 7cm Height = 20 cm

∴ Total surface area of cylinder = 2πr (h+r)

= 2 × 22/7 × 7 (20 + 7)

= 2 × 22/7 × 7 × 27 = 1188 cm2