Volume of two sphere are in the ratio 64 : 27. The ratio of their surface area is:

Solve x = 6y = 0 and 3x - 3 y = 15.

Spherical ball of diameter 21 cm is melted and recasted into cubes, each of side 1 cm. Find the number of cubes thus formed.

Calculate x from the following figure.
tan 58° = 1.6

The y - intercept of the straight line y = -x is:

Gradient of the line joining the points (5,6) and (1,2) is:

Sin²30^o + cos²60^o =

Gradient of a line perpendicular to the line joining the points (6,4) and (3,1) is:

If tan 5θ = 1, then, θ =

If radius of a sphere is doubled then its volume becomes ________ times.