The students of three classes are in the ratio 4 : 6 : 9. If 12 students are increased in each class the ratio changes t…

The mean proportional between $$\left( {3 + \sqrt 2 } \right)$$   and $$\left( {12 - \sqrt {32} } \right)$$ &am…

If x : y = 3 : 1, then x<sup>3</sup> - y<sup>3</sup> : x<sup>3</sup> + y<sup>3…

Two alloys contain tin and iron in the ratio of 1 : 2 and 2 : 3. If the two alloys are mixed in the proportion of 3 : 4 …

94 is divided into two parts in such a way that fifth part of the first and the eighth part of the second are in the rat…

A track covers a distance of 550 metres in 1 minute whereas a bus covers a distance of 33 kms in 45 minute. The ratio of…

Two numbers are in the ratio 3 : 5. If 6 is added to both of them, the ratio becomes 2 : 3. The numbers are = ?

Suppose y varies as the sum of two quantities of which one varies directly as x and the other inversely as x. If y = 6 w…