Solution for Exercise 3 Page 89 Math 4 Textbook

Guide to Solve Exercise 3 Page 89 Math 4 Textbook

Problem:
A rectangular soccer field has an area of 7140 m², with a length of 105m.
a) Find the width of the soccer field;
b) Calculate the perimeter of the soccer field.

Solution Method:
a) To find the width of the soccer field, we divide the known area by the known length
b) Apply the formula for the perimeter of a rectangle: S = (a + b) x 2 (where S represents area; a is length; b is width)

Answer:
a) The width of the soccer field is :
            7140 : 105 = 68 (m)
b) The perimeter of the soccer field is :
          (105 + 68) x 2 = 346 (m)
                    Answer: a) Width: 68m
                                  b) Perimeter: 346 m

Part solving math problems class 4 page 89, Practice includes 3 exercises, Next, solve exercise 3 on page 89 of Math 4 Textbook. Mytour has suggested answers and detailed solution methods for Solve Exercise 1 on Page 89 Math 4 Textbook and Solve Exercise 2 on Page 89 Math 4 Textbook, students need to understand the knowledge of this lesson.