Volume of two sphere are in the ratio 64 : 27. The ratio of their surface area is.
3 : 4
4 : 3
9 : 16
16 : 9
Gradient of the line joining the points (5,6) and (1,2) is
-1
1
2
-2
Calculate x from the following figure.
12 cm
15.3 cm
19.2 cm
20 cm
Three sphere of radii 3 cm, 4cm and 5 cm are melted to form a new sphere. Then, the radius of the new sphere is.
6 cm
7.5 cm
10 cm
If tan 5θ = 1, then, θ=
8o
45o
5o
9o
Gradient of the straight line y = 2x + 1 is
0
Gradient of a line perpendicular to the line joining the points (6,4) and (3,1) is
If radius of a sphere is doubled then its volume becomes ________ times.
3
8
The diameter of a copper sphere is 6 cm. The sphere is meted and is drawn into a long wire of uniform circular cross - section. If the length of the wire is 36 cm, find its radius.
1 cm
1. 5 cm
2 cm
3 cm
Solve 2x + y = 12 and 2x - y = 8.
x = 1, y = 2
x = 5, y = 1
x = 5, y = 2
x = 2, y = 5
