Question

9. A rectangular sheet of paper is 15 3by 4 cm long and 12 1 by 2


cm wide. Find its perimeter.
​

Answer 1

Step-by-step explanation:

the answer is 56 1/2

check the image for steps

Answer 2

Answer:

Given:-

A rectangular sheet of paper is 15 ¾ cm long and 12 ½ cm wide. Find its perimeter.

To Find:-

The perimeter of a rectangular sheet of paper.

Note:-

●》For finding perimeter of a rectangular sheet of paper = 2 ( long + wide )

●》If there is any number or sign out of bracket it will be multiplied to it.

●》Mixed fraction should be converted to improper fraction before calculating.

●》When calculating , if the denominators of numbers are not equal then we need to take L.C.M

Solution:-

Long = 15 ¾ cm, Wide = 12 ½ cm

☆ According to note first point~

▪︎Perimeter of rectangular sheet of paper = $2 ( long + wide )$

▪︎Perimeter of rectangular sheet of paper = $2 ( 15 ¾ cm + 12 ½ cm )$

☆ According to note third point ( improper fraction) , so it will be~

▪︎Perimeter of rectangular sheet of paper = $2 ( 63/4 cm + 25/2 cm )$

☆ According to note fourth point~

L.C.M of 4 and 2 is = 4, so it will be~

▪︎Perimeter of rectangular sheet of paper = $2 ( 63/4 ×1/1 cm + 25/2 × 2/2 cm )$

▪︎Perimeter of rectangular sheet of paper = $2 ( 63/4 cm + 50/4 cm )$

▪︎Perimeter of rectangular sheet of paper = $2 × 113/4 cm$

☆ After doing calculations~

▪︎Perimeter of rectangular sheet of paper = $113/2 cm$

☆ It can be converted to mixed fraction or in decimal form~

▪︎56 ½ cm or 56.5 cm

Answer:-

Hence, The perimeter of rectangular sheet of paper is = 56 ½ cm or 56.5 cm