How many meters of carpet 50cm, wide will be required to cover the floor of a room 30m * 20m?
A. 1000
B. 600
C. 2400
D. 1200
50/100 * x = 30 * 20 => x = 1200
Volumes
A rectangular courtyard, the sides of which are in the ratio of 4:3, cost Rs.600 for paving at 50 p per m2; find the length of the diagonal of the courtyard?
A rectangular courtyard, the sides of which are in the ratio of 4:3, cost Rs.600 for paving at 50 p per m2; find the length of the diagonal of the courtyard?
A. 25 m
B. 35 m
C. 45 m
D. 50 m
If the sides of a cube are in the ratio 4:3. What is the ratio of their diagonals?
If the sides of a cube are in the ratio 4:3. What is the ratio of their diagonals?
A. 4:3
B. 16:9
C. 64:27
D. 3:4
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?
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