Question

Please solve this...this is actually urgent​

Answer 1

Answer:

None of these

Step-by-step explanation:

Given :-

In a right circular cylinder the radius and height are equal and the total surface area is Kπh² .

To find :-

Find the value of K ?

Solution :-

Let the radius of a right circular cylinder be r units

Let the height of the right circular cylinder be

h units

Given that

Radius amd height are equal in the cylinder.

=> r = h -------------(1)

We know that

Total Surface Area of a cylinder=2πr(r+h) sq.units

From (1) It becomes

TSA of the cylinder = 2πr(r+r)

=> 2πr(2r)

=>TSA = 4πr² sq.units

According to the given problem

The Total Surface Area = Kπh²

It can be written as from (1)

=> Kπh² => Kπr²

Now,

=> 4πr² = Kπr²

On cancelling πr² both sides then

=> 4 = K

=> K = 4

Answer:-

The value of K for the given problem is 4

Used formulae:-

Total Surface Area of a cylinder=2πr(r+h) sq.units

Where, r = radius and h = height and π = 22/7

Note :-

If the radius and height are equal in a right circular cylinder then it's total surface area is equal to the total surface area of a sphere

Answer 2

Thanks

Answer:

None of these

Step-by-step explanation:

Given :-

In a right circular cylinder the radius and height are equal and the total surface area is Kπh² .

To find :-

Find the value of K ?

Solution :-

Let the radius of a right circular cylinder be r units

Let the height of the right circular cylinder be

h units

Given that

Radius amd height are equal in the cylinder.

=> r = h -------------(1)

We know that

Total Surface Area of a cylinder=2πr(r+h) sq.units

From (1) It becomes

TSA of the cylinder = 2πr(r+r)

=> 2πr(2r)

=>TSA = 4πr² sq.units

According to the given problem

The Total Surface Area = Kπh²

It can be written as from (1)

=> Kπh² => Kπr²

Now,

=> 4πr² = Kπr²

On cancelling πr² both sides then

=> 4 = K

=> K = 4

Answer:-

The value of K for the given problem is 4

Used formulae:-

Total Surface Area of a cylinder=2πr(r+h) sq.units

Where, r = radius and h = height and π = 22/7

Note :-

If the radius and height are equal in a right circular cylinder then it's total surface area is equal to the total surface area of a sphere

ANSWER