Shown below is a solid made by joining a right circular cylinder and a hemisphere of equal radius (r cm). The total surface area of the solid is equal to the surface area of a sphere with twice the radius of this solid.

Which of the following gives the height of the cylinder in the above solid?

(A) 6r cm 

(B) 6.5r cm 

(C) 7r cm 

(D) 7.5r cm

 

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Shown below is a solid made by joining a right circular cylinder and a hemisphere of equal radius (r cm). The total surface area of the solid is equal to the surface area of a sphere with twice the radius of this solid. Which of the following gives the height of the cylinder in the above solid? (A) 6r cm (B) 6.5r cm (C) 7r cm (D) 7.5r cm

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Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 14 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.