Two trains of equal length are running on parallel lines in the same direction at 46km and 36km per hour. The faster train passes the slower train in 36 seconds. The length of each train is -
If the area of a triangle with base x is equal to the area of a square with side x, then the altitude of the triangle is-
If the radius of a circle is reduced by 40%, its circumference is reduced by-
In a mixture of 45 liters, the ratio of milk and water is 4 : 1. How much water must be added to make the mixture ratio 3 : 2?