Find the simlest value of 2√50+√18-√72 (given √2 = 1414).

If 4x-3/x+4y-3/y+4z-3/z = 0

then the value of 1/x + 1/y + 1/z is

If x2 – 3x + 1 = 0, then value of

x2 + x + 1/x+1/x2 is

The simple interest on Rs. 4000 in 3 yr at the rate of x% per annum equals to the simple interest on Rs. 5000 at the rate of 12% per annum in 2 yr. The value of x is

A certain distance is covered at a certain speed. If half of this distance is covered in double the time, the ratio of the two speeds is

Two cars are moving with speeds v1 and v2 towards a crossing along two roads. If their distance from the crossing be 40 m and 50 m at an instant of time, then they do not collide, if their speeds are such that