Question

the volume of cylinder is 5183 cm cube. A cone with same height and radius as that of cylinder is carved out of it .The cone is then melted and recasted into two equal cuboids .Find the cost of gold plating both cuboids at the rate of ₹2.50 per cm square. a)2880 b)2550 c)2884 d)2894​

Answer 1

Answer:

Answer Is d

Step-by-step explanation:

Hope it helps can't give full explanation

Answer 2

Answer:

Answer

Let r

1

,h

1

and r

2

,h

2

be the radius and height of of cone and cylinder respectiely.

Given, h

2

=9cm,d

2

=40cm

r

2

=

2

40

=20cm,h

1

=108cm.

Volume of the cone = Volume of the cylinder.

3

1

πr

1

2

h

1

=πr

2

2

h

2

3

1

πr

1

2

(108)=π(20)

2

(9)

r

1

2

(108)=3×9×(20)

2

r

1

2

=

108

3×9×400

r

1

2

=100cm.

r

1

=10cm

Thus, the radius of the base of the cone is 10cm.

Step-by-step explanation:

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