In a triangle, lengths of all the three medians are 9 cm, 12 cm. and 15 cm respectively. Then what will be the area of the triangle?

The students in three classes are in the ratio 2 : 3 : 5. If 20 students are increased in each class, the ratio changes to 4 : 5 : 7 . originally the total number of students was: 

Given that DE || BC, AD : DB = 3 : 4, find out ar(∆ADE)/ar(∆ABC)?

If a(tanθ+cotθ)=1, sinθ+cosθ=b and 0°<θ<90°, then the relation between a and b.

If 738 A6A is divisible by 11, then the value of A is-

The average of five natural numbers is p. If the next three numbers are included then how much the average of these 8 numbers exceeds than the average p?

By reducing the circumference of a circle by 50 percent, by what percentage will its area decrease?

The marked Price of a television is Rs. 12,000 and the shopkeeper gives 5 percent discount on it. So what is its selling price