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
12 cm
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 straight line y = 2x + 1 is:
0
1
-1
2
If radius of a sphere is doubled then its volume becomes ________ times.
3
8
If tan 5θ = 1, then, θ =
8o
45o
5o
9o
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
Spherical ball of diameter 21 cm is melted and recasted into cubes, each of side 1 cm. Find the number of cubes thus formed.
4800
5800
4851
5851
Calculate the area of the following triangle.
65 cm2
70 cm2
72 cm2
79 cm2
Volume of cylinder with radius 3 cm and height 7 cm is:
51π cm3
55π cm3
63π cm3
70π cm3
Gradient of the line joining the points (5,6) and (1,2) is:
-2
