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The ratio of curved surface area of a cylinder and cone is 8:5. What will be the ratio of their heights if the radius and height of cylinder is same. Cone is placed on cylinder.

The Himalayas _______ among the highest mountain ranges in the world . ( to be )

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There is a lot of interest in the first five ranks for Class XI students. One student guessed the rank order as Ankita, Bhagyashree, Chanchal, Devroopa and Esha. Later upon announcement of the result, it was found that not only did he get each student out off her true position, none of the students in his ranking correctly followed her immediate predecessor. Another student guessed Devroopa, Ankita, Esha, Chanchal and Bhagyashree. Even his guess was wrong. It was found that he had got two positions correct, and two students in his ranking correctly followed their immediate predecessors. Correct order of rankings????

if a be the Arithmetic Mean and b,c be the GM between any two positive numbers then (b^3 +c^3)/abc equals i) ((ab)^1/2)/c ii)1 iii) none of these

In a certain colony of cancerous cells,each cell breaks into 2 new cells every hour.how many cells will the colony have at the end of the 9 hours?it is known that life of a cell is 20 hours?i)2^9-1 ii)2^9 iii)2^10 iv)2^10-1

the sum of the first n terms of the AP is equal to half of the sum of the next n terms of the same AP.find the ratio of the sum of the first 3n terms of the progression to the sum of its first n terms.i)5 ii)6 iii)7 iv)8

question 3 of the probability test 7 has a wrong solution , there are only 4 steps to be taken westwards

if 3 positive real numbers x,y,z are in AP such that xyz=4,then what will be the minimum value of y?i)2^1/3 ii)2^2/3 iii) 2^1/4 iv) 2^3/4

if x,y,x are in GP and a^x,b^y,c^z are equal then a,c,b are in i)AP ii)GP iii)HP