Question

bhaiyo or behno 7 crore ka swal apki screen par ye raha 2 or 3 if you answer both you will be mark as brainlist

Answer 1

Answer:

1:3, 37 cm

Step-by-step explanation:

(2)

Let the radius be r₁ and r₂ and height be h₁,h₂.

Given that ratio of cylinders is 1:3

So, r₁/r₂ = 1/3.

Given that the heights are equal.

So, h₁ = h₂ (or) h₁/h₂ = 1.

Now,

Ratio of their curved surface areas:

⇒ 2πr₁h₁/2πr₂h₂

⇒ r₁h₁/r₂h₂

⇒ (r₁/r₂) * (h₁/h₂)

⇒ (1/3) * 1

⇒ (1/3).

⇒ 1:3

(3)

Given, base radius = 7 cm.

Given, TSA = 1936 cm².

⇒ 2πr(r + h) = 1936

⇒ 2 * (22/7) * 7 * (7 + h) = 1936

⇒ 44 * (7 + h) = 1936

⇒ 7 + h = 44

⇒ h = 37 cm.

Therefore, height of a cylinder = 37 cm.

Hope it helps!

Answer 2

Where r and h is radius and height of the cylinder respectively.

Now the heights of the two cylinders are equal

h1 = h2 = h

And radius are in the ratio 1:3

So r1:r2 = 1:3

Now the ratio of CSA

CSA1:CSA2 = 2π(r1)h : 2π(r2)h

CSA1/CSA2 = 2π(r1)h/2π(r2)h

CSA1/CSA2 = r1/r2

CSA1:CSA2 = r1:r2 = 1:3

CSA1:CSA2 = 1:3