Question

please solved this one​

Answer 1

Step-by-step explanation:

see the attachment

Thank you

Answer 2

1: 2 is the ratio of height of top part / remaining part

Step-by-step explanation:

Curved surface area of whole = 9A

Curved surface area of remainder = (8/9)9A = 8A

Curved surface area of top portion cutted = 9A - 8A  = A

Let say height of cone  = H

Radius of cone = R

cut part height  = h

Radius of cut portion = r

Slant height of Cone = L

Slant height of cut = l

h/H  = r/R  = l/L = 1/k

Curved Surface Area of  cone = πRL  = 9A

Curved surface area of top portion cutted = πrl  = A

=> πRL / πrl   = 9A/A

=> (R/r)(L/l)  = 9

=> k² = 3²

=> k = 3

=> l/L = 1/3

=> L = 3l

l/(L - l)  =  l/(3l - l) = l/2l  = 1:2

1: 2 is the ratio of height of top part / remaining part

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