If $$x=(\sqrt2+1)^{1\over3} $$, the value of $$(x^3-{1\over {x^3}}) $$ is

The ratio between the volume (cm³) of a cylinder and the curved surface area (cm²) is numerically 14: 1. If the height of the cylinder is 50 cm, what is the volume of the cylinder (cm³) ?

If (a+b) : (b+c) : (c+a) = 7 :6 : 5 and (a+b+c)=27, then what will be the value of $$ {1\over b}:{1\over a}:{1\over c}$$.

The maximum number of common tangents drawn to two circles when both the circles touch each other externally is 

Find the area of the largest triangle made in a semicircle of r cm radius?

If one angle is half of its complementary angle, find that angle.

What will be the compound interest of 3 years at the rate of 5 % of 1000 rupees?

The value of   $${(75.8)^2-(55.8)^2\over20}$$