A sum is divided among 120 men and some women in the ratio 15:21. If each man gets Rs. 5 and each woman gets Rs. 4, the number of women is

Find the minimum value of x which the expression  
x³-7x²+11x - 5 ≥ 0.

A bus can travel $$ 12{2\over5}$$ Km in one hour. How much distance will it cover in $$ 2{3\over4}$$ hours? 

The length of two chords AB and AC of a circle are 8 cm and 6 cm and ∠BAC=90º, then the radius of circle is

Greatest among the numbers
$$^{3}\sqrt{9},\sqrt{3},\ ^{4}\sqrt{16},\ ^{6}\sqrt{180}$$ is

A person has some amount with him. 25% of it is stolen in a bus, 10% is lost through a hole in the pocket, 50% of remainder is spent on food. He then purchases a book worth Rs. 26 from the remainder. He walks back home because all his money is over. What was the initial amount?

If 0.5x + 0.7y=0.5 and 0.7x + 0.5y=0.7,then the value of x+y is

If $$ {2sinθ-cosθ\over cosθ+sinθ}=1 $$ then the value of Cotθ is