Three cubes of metal whose edges are 9, 12 and 15 cm respectively, are melted and one new cube is made. Find the edge of the new cube?
A. 21 cm
B. 19 cm
C. 32 cm
D. 18 cm
The ratio between the radii of two spheres is 1:3. Find the ratio between their volumes?
The ratio between the radii of two spheres is 1:3. Find the ratio between their volumes?
A. 27:1
B. 1:27
C. 1:9
D. 9:1
r1 : r2 = 1:3
r13 : r23 = 1:27
How many shots of 1cm radius can be prepared from a sphere of 3cm radius?
How many shots of 1cm radius can be prepared from a sphere of 3cm radius?
A. 36
B. 64
C. 27
D. 16
Explanation:
4/3 π * 3 * 3 * 3 = 4/3 π * 1 * 1 * 1 * x
x = 27
Find the ratio between whole surfaces of a sphere and a hemisphere?
Find the ratio between whole surfaces of a sphere and a hemisphere?
A. 3:4
B. 4:3
C. 3:1
D. 1:3
4 πr2 : 3 πr2 => 4:3
The curved surface of a sphere is 64 π cm2. Find its radius?
The curved surface of a sphere is 64 π cm2. Find its radius?
A. 1 cm
B. 2 cm
C. 4 cm
D. 3 cm
The slant height of a cone is 12 cm and radius of the base is 4cm, find the curved surface of the cone.
The slant height of a cone is 12 cm and radius of the base is 4cm, find the curved surface of the cone.
A. 74 π cm2
B. 36 π cm2
C. 48 π cm2
D. 24 π cm2
π * 12 * 4 = 48
The area of a base of a cone is 30 cm2. If the height of the cone is 6cm, find its volume?
The area of a base of a cone is 30 cm2. If the height of the cone is 6cm, find its volume?
A. 120 cm3
B. 40 cm3
C. 50 cm3
D. 60 cm3
πr2 = 30 h = 6
1/3 * 30 * 6 = 60
The radius of the base of cone is 3 cm and height is 4 cm. Find the volume of the cone?
The radius of the base of cone is 3 cm and height is 4 cm. Find the volume of the cone?
A. 12 π cm3
B. 6 π cm3
C. 8 π cm3
D. 10 π cm3
Find the ratio of the curved surfaces of two cylinders of same heights if their radii are in the ratio 1:2.
Find the ratio of the curved surfaces of two cylinders of same heights if their radii are in the ratio 1:2.
A. 1:2
B. 2:1
C. 1:4
D. 4:1
Two cylinders are of the same height. Their radii are in the ratio 1: 3. If the volume of the first cylinder is 40 cc. Find the volume of the second cylinder?
Two cylinders are of the same height. Their radii are in the ratio 1: 3. If the volume of the first cylinder is 40 cc. Find the volume of the second cylinder?
A. 360 cc
B. 60 cc
C. 300 cc
D. 36 cc
r1 = x r2 = 3x
Π * x2 * h = 40
Π9 x2h = 40 * 9 = 360