If 2sinθ+cosθ= $${7\over3}$$ then the value of (tan²θ-sec²θ) is

If $$ {y\over {x-3}}={y+x\over 3}={x\over y}$$ then 3 : y : x equal to :

On simplification of   $$ {(2.664)^2-(2.356)^2\over0.288}$$

Abdul prepared 42 litres of medicine and filled it in bottles of 280 ml each. Find how many bottle would be required?

30 persons can do a piece of work in 24 days. How many more people are required to complete the work in 20 days?

Let D and E be two points on the side BC of △ABC such that AD = AE and BAD = ∠EAC. If AB = (3x+1) cm, BD=9 cm, AC = 34 cm and EC = (y+1) cm, then the value of (x + y) is:

The speed of a boat in still water is 10 km/hr. It covers (upstream) a distance of 45 km in 6 hours. The speed (in km/hr) of the stream is : 

Aman and Ajay can build a wall in 9 days and 12 days respectively. In how many days can they finish the work if they work together?