 Hello and welcome to the session. In this session we discuss a question which says that the length of the rectangle is 32.3 cm and its width is 14.84 cm. Using the correct number of significant digits in the answer, express the perimeter and the area. Now before starting the solution of this question, we should know a result. And that is, when we add or multiply two given measurements, then the obtained answer should have as many significant digits as in the measurement having least number of significant digits. It means, answer should be known with the size, then the least precise measurement. Now this result will work out as a key idea for serving out a given question. Now let us start with the solution of the given question. Now we are given a rectangle the following dimensions, that is, length is equal to 32.3 cm and width is equal to 13.84 cm. So we are given length n is equal to 32.3 cm and width w is equal to 14.84 cm. First of all, let us find perimeter of the rectangle. Now we know that perimeter of the rectangle is equal to 2 into length plus width the whole. So this is equal to 2 into 32.3 cm plus 14.84 cm the whole. This is equal to 2 into 47.14 cm and this is equal to 94.28 cm. So perimeter of the rectangle is equal to 94.28 cm. Now we have to write the answer using correct number of significant digits. Now using the result which is given to us in the key idea, we see that least precise measurement is 32.3 cm and it has only 3 significant digits. Our answer should also contain only 3 significant digits. So we round out the answer to 3 significant digits. So let us round it off to 3 significant digits. So we have perimeter of rectangle is equal to 94.3 cm. Now we have to find area of rectangle is equal to length into width which is equal to 32.3 cm into 14.84 cm which is equal to 479.332 cm. Now again we have to write area using correct number of significant digits. Now since 32.3 cm is least precise measurement having 3 significant digits. So area will also have 3 significant digits. So we round off 479.332 cm to 3 significant digits. So area of rectangle should be written as 479 cm. So here using the correct number of significant digits in the answer we have expressed the perimeter and the area of the given rectangle. And this is the solution of the given question. That's all for this session. Hope you all have enjoyed the session.