Question

Find the height of the cylinder,if a hollow sphere of internal & external radii 3 cm & 4 cm respectively is melted into a cylinder of 37 cm.

Answer 1

$<b><i>hey mate$

Since the cylinder is hollow, we get the area of the curved surface.

The internal surface area :

Let the height of the cylinder be h.

r = 4

Curved surface area = πDh

πD = 3.142 × 8 = 25.136

C. A = 25.136h

The external surface area :

The height = h

D = 6 × 2 = 12`

C. A = 12 × 3.142 × h = 37.704h

Internal surface to external surface :

25.136 /37.704

= 25/38

Approximately :

25 : 38

Answer 2

Step-by-step explanation:

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