The ratio between the third proportional of 12 and 30 and mean proportional of 9 and 25 is -

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…

The Lucknow-Indore Express without its rake can go 24 km an hour, and the speed is diminished by a quantity that varies …

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 …

The income of A, B and C are in the ratio 7 : 9 : 12 and their spending are in the ratio 8 : 9 : 15. If A saves $$\frac{…

A barrel contains a mixture of wine and water in the ratio 3 : 1. How much fraction of the mixture must be drawn off and…

In a college the students in Arts and commerce faculties were in the ratio of 4 : 5 respectively. When 65 more students …

A and B are two alloys of gold and copper prepared by mixing metals in the ratio 7 : 2 and 7 : 11 respectively. If equal…