Twenty women can do a work in sixteen days. Sixteen men can complete the same work in fifteen days. The ratio between the capacity of a man and a woman is

The value of sinθ1+cosθ + sinθ1-cosθ

The area of the largest triangle that can be inscribed in a semicircle of radius 6m is

If a2+b2c2 = b2+c2a2 = c2+a2b2 = 1k k≠0 then k =

If a+1a2 = 3, then the value of  a3+1a3 is

The simplest value of 38-212+20318-227+45 is

A sum of Rs. 3000 yields an interest of Rs. 1080 at 12% per annum simple interest in how many years ?

A gun is fired at a distance of 1.7 km from Ram and he hears the sound after 25 seconds. The speed of sound in meter per second is