This shell script accepts the length and breadth of a rectangle from the user and finds the area of Rectangle.

Formula:

Area of Rectangle = Length x Breadth

Shell Script:

#/bin/bash
#Shell Script to find the area of rectangle

echo "Enter the length of the rectangle:"
read length
echo "Enter the breadth of the rectangle:"
read breadth

area=`expr $length \* $breadth`
echo "Area of Rectangle = $area"

Output:

Enter the length of the rectangle:
15
Enter the breadth of the rectangle:
20
Area of Rectangle = 300