Volume & Surface Area Questions and Answers
Practice ModeShowing 10 of 99 questions
Q41
Three sphereical metal balls of radii 6 cm, 8 cm and R cm are melted into a solid sphere of rdius 12 cm. The value of R is :
Answer: Option B
Q42
If the volume of a sphere is divided by its surface area, the result is 27 cm. The radius of the sphere is :
Answer: Option A
Q43
A cone and a sphere have equal radii and equal volumes. The ratio of the diameter of the sphere to the height of the cone is :
Answer: Option D
Q44
The radius of a sphere is increased by 50%. The increase in the surface area of the sphere is :
Answer: Option D
Q45
How many bullets can be made out of a cube of lead whose edge measures 22 cm, each bulet being 2 cm in diameter ?
Answer: Option D
Q46
A Spherical ball of lead, 3 cm in diameter is melted and recast into three spherical balls. the diameter of two of these are 1.5 cm and 2 cm respectively. The diameter of the third ball is :
Answer: Option B
Q47
If the radius of a sphere is doubled, then its surface area is increased by :
Answer: Option D
Q48
If a solid sphere of radius 10 cm is moulded into 8 spherical solid balls of equal radius, then the radius of each such ball is :
Answer: Option D
Q49
How many lead shots each 0.3 cm in diameter can be made from a cuboid of dimensions 9 cm x 11 cm x 12 cm ?
Answer: Option C
Q50
A metallic right circular cones having their heights 4.1 cm and 4.3 cm and the radii of their bases 2.1 cm each, have been melted together and recast into a sphere. the diameter of the sphere is :
Answer: Option A