The average salary of male employees in a firm was Rs. 5200 and that of females was Rs. 4200. The mean salary of all the employees was Rs. 5000. What is the % of female employees?

The value of (sec245 - cot245) - (sin230 + sin260) is

If the length of a chord of a circle is equal to that of the radius of the circle, then the angle subtended, in radians, at the centre of the circle by chord is

ΔABC and ΔDEF are two similar triangles and the perimeter of ΔABC and ΔDEF are 30 cm and 18 cm respectively. If length of DE = 36 cm, then length of AB is

The value of (1 - √2) + (√2 - √3) + (√3 - √4) + ..... + (√15 - √16) is

The value of aa-b+bb-a is

A Bus travels at the speed of 36 km/hr, then the distance covered by it in one second is

The weights of two iron balls are 3.5 kg and 7.5 kg. What is the percentage weight of the 1st ball with respect to 2nd ball.