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Q.

The surface area of sphere is the same as the curved surface area of cone having the radius of base as 120 cm and height 160 cm.

Find the radius of sphere.

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a

95 cm 

b

67 cm 

c

77.46 cm 

d

80 cm  

answer is C.

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Detailed Solution

 Lateral height of cone
 Question Image Question Image Question ImageSurface area of sphere = Surface area of cone
 4  πr12 = πrl
Question Image r12 = 6000
Question Image
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