Question

(d) 14 cm
14) A solid iron cylinder of radius 4.4 cm is
melted and shaped into a cube of side
8.8 cm. Then the height of the cylinder
is:
(a) 11.2 cm (b) 20 cm
(c) 11 cm (d) 11.6 cm​

Answer 1

Answer:

vol. of cylin. = πr²h.

vo. of cube = a³

Since, πr²h = a³ (because the cylinder is melted and form a cube that's why tge volume of both remain same.)

3.14×4.4×4.4×h = 8.8×8.8×8.8

h = 8.8×8.8×8.8/3.14×4.4×4.4

h = 681.472/60.7904

h = 11.21 cm approx.

So, the answer is a) 11.2 cm.

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Answer 2

Answer:

option (a)

Step-by-step explanation:

volume of cylinder. = πr²h.

volume of cube = a³

Since, πr²h = a³ (because the cylinder is melted and form a cube that's why t g e volume of both remain same.)

3.14×4.4×4.4×h = 8.8×8.8×8.8

h = 8.8×8.8×8.8/3.14×4.4×4.4

h = 681.472/60.7904

h = 11.21 cm approx.

So, the answer is a) 11.2 cm

i know it helps