1000 solid spherical balls each of radius 0.6 cm are melted and recast – McqOptions

MCQOPTIONS

1.	1000 solid spherical balls each of radius 0.6 cm are melted and recast into a single spherical ball. What is the surface area (in cm2) of ball so formed?
A.	144 π
B.	128 π
C.	124 π
D.	108 π
Answer» B. 128 π

Discussion

No Comment Found

Related MCQs

How many cubes of 25 cm edge can be put in a cubical box of 1 m edge?
A solid right circular cone of height 27 cm is cut into pieces along a plane parallel to its base at a height of 18 cm from the base. If the difference in volume of the two pieces is 225 cc, the volume, in cc, of the original cone is
A rectangular field of length 242 m has an area of 4840 m2. What will be the cost of fencing if the cost of fencing is 50 paise/meter?
If height of a cylinder is 50 cm and radius is 14 cm, what is the volume of it?
If the measure of the sides of a cuboid are 8 cm, 6 cm and 10 cm, then the volume (in cm3) of the cuboid is:
A and B are two cones. The curved surface area of A is twice that of B. The slant height of B is twice that of A. What is the ratio of radii of A to B?
Height of a right circular cone is 8 cm. If diameter of its base is 12 cm, then what will be the curved surface area of the cone?
A semicircle is inscribed inside a rectangle in such a way, so that the diameter of the semicircle coincides with the length of the rectangle. If the area of the semicircle is 50 π, then what is the area of the rectangle?
A cloth of 3 m width is used to make a conical tent 12 m in diameter with a slant height of 7 m. What is the length of the cloth? (Take π = 22/7)
If the area of a square is 16 cm2, then the area of the square obtained by joining the mid-points of its sides in order is -