Question

What will be the perimeter and area of the given figure, when :
Length= 8 m, breadth = 3 m​

Answer 1

Answer:

Since the perimeter is equal to the sum of all the sides of the polygon. Hence, in the case of a rectangle, the perimeter (P) is;

P = sum of all its four sides

P = a + b + a + b (Opposite sides of rectangle are equal)

P = 2(a + b)

Hence, derived.

Therefore,

Perimeter of a rectangle = 2(Length + Width) square units

Now let us write the formula for the area of a rectangle, with respect to same above given figure;

Area of a rectangle = Length × Width = a × b

Solved Problems

Q.1: Find the perimeter of a rectangle whose length and width is 5 cm and 10 cm, respectively.

Solution: Given:

Length = 5 cm and Width = 10 cm

We know,

The perimeter of a rectangle = 2(length + width)

Substitute the value of length and width here,

Perimeter, P = 2(5 + 10) cm

P = 2 x 15 cm

Therefore, the perimeter of a rectangle = 30 cm

Answer 2

Step-by-step explanation:

Perimeter=2*(L+B)

P=2*(8+3)

P=2*11

P=22m

Area=L*B

A=8*3

A=24 m2