Question

Which of the following statements is/are true?
A. Suppose a sphere has a diameter of 10 cm. Suppose the height of a closed right circular cylinder
is double its radius, and that its radius is the same as the radius of the sphere. The ratio of the
surface area of the sphere to that of the cylinder is 2 : 3.
B. If the diameter and height of a right circular cone are equal then the lateral surface area of the
cone is √
5πr2
, where the radius is r. (Note: Lateral surface area of cone is the area of the sides
only.)
C. If the diagonals of a quadrilateral intersect at right angles the quadrilateral must be a square or
a rhombus or a kite.
1. Only A 2. Only B 3. Only C
4. Only A and C 5. A, B and C

Answer 1

C is the difference between

Answer 2

Answer:supposed a sphere has a diameter of 10cm suppose the height of a closed right circular cylinder is double its radius, and that its radius is the same as radius of the sphere the ratio of the surface area of the sphere of that of the cylinder is 2 : 3