 Hi and welcome to the session. I am Kanika and I am going to help you to solve the following question. The question says the height of a cone is 15 cm if its volume is 1570 cm2. Find the radius of the base. Views pi is equal to 3.4. Before solving this question, we should know the formula for finding the volume of a cone. Volume of a cone is equal to 1 by 3 pi r square h where r is the base radius and h is the height of the cone. The knowledge of this formula is the key idea in this question. Let's now begin with the solution, let radius of the base be r cm. In the question, we are given that height of the cone that is h is equal to 15 cm and volume of the cone is 1570 cm2. We have learnt in the key idea that volume of cone is equal to 1 by 3 pi r square h as volume is equal to 1570 cm2. So this means 1570 is equal to 1 by 3 into 3.14 into r square into 15 cm. We have substituted the value of pi and h. Now this implies r square is equal to 1570 into 3 upon 3.14 into 15 and this is equal to 100 cm and this implies r is equal to 10 cm. So radius of the base is 10 cm. This is our required answer. So this completes the session. Bye and take care.