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author of India 2020 : A vision for the new millennium

if the volume of two right circular cones are in the ratio 1:4 and there diameters of bases are in the rario 4:5 then their heivht will be in the ratio :

Some one please explain to me on the solution to this problem.

Hi, There is something wrong with the 15 min tests in the video series section(all sections). I am not able to select any answer or submit any test. Please help asap as not much time left for CAT.

who is the governor of india

i want important current gk question for railway

2+2

How to solve para jumbles 

Please give the solution with explanation

lake of india