 Hi and welcome to the session I am Deepika here. Let's discuss the question. Find the approximate change in the surface area of a cube of size X meters caused by decreasing the size by 1%. So let's start the solution. Let S be the surface area of a cube of size X meter. We know the surface area of a cube is 6 into sides there. Therefore, S is equal to 6 X square. This implies dS by dx is equal to 12 X. Now, percentage degrees inside is equal to 1%. This implies delta X is equal to 1% of X. That is 0.01 X. Let delta S be the approximate change in the surface area. Therefore, delta S is equal to dS by dx into delta X. Now, dS by dx is 12 X. So this is equal to 12 X into 0.01 X. So this is equal to 0.12 X square meter square. Hence, the approximate change in the surface area is 0.12 X square meter square. And this is an answer for the above question. I hope the question is clear to you. Bye and take care.