 Hello and welcome to the session. My name is Asha and I shall be helping you with the following question that says, find the volume of a sphere whose radius is per 7 centimeter and second 0.63 meters cube. So, first let us learn the formula to calculate the volume of a sphere of radius r centimeters. So, this is equal to 4 upon 3 pi r cube centimeters cube. So, with the help of this formula we are going to solve the above problem. So, this is our key idea. Now, let us start with the solution. In the first part we are given the radius of a sphere. Let us denote it by small r is equal to 7 centimeters and thus volume of a sphere is equal to 4 upon 3 into pi r cube and substituting the values of pi and r we are 4 upon 3 into 22 upon 7 into 7 into 7 into 7 centimeters cube and this is equal to 1, 4, 3, 7 then 1 upon 3 centimeters cube and now proceeding on to the second part. Here we are given the radius of a sphere. Let us note it by capital R is equal to 0.63 meters and thus volume of a sphere is equal to 4 upon 3 into pi is 22 upon 7 into 0.63 into 0.63 into 0.63 meters cube and this is equal to 1.05 meter cube approximately. Hence our answer is sphere having radius 7 centimeter has volume 1, 4, 3, 7 then 1 upon 3 centimeters cube. If the radius of the sphere is 0.63 meters then its volume is 1.05 meters cube approximately. So, this completes the session. Bye and take care.