Question

if the equation z? + y2 + 2gx + 2fy +1 = 0 represents a pair of lines then​

Answer 1

Step-by-step explanation:

ANSWER

REF.Image

Length = 11 cm

Breadth = 4 cm.

When the rectangle is converted into a cylindrical shape

Since the rectangle is rolled along it's width to make cylinder.

Height of cylinder = Width of rectangle = 4 cm

Let the radius of the cylinder be r

∴ Perimeter of the cylinder = length of the rectangle.

So by the formula of circumference circle

2πr=11

⇒2×

7

22

×r=11

⇒

7

44

×r=11

⇒r=11×

44

7

=

4

7

Volume of cylinder = πr

2

h

=

7

22

×

4

7

×

4

7

×4

=

2

77

=38.5cm