Question

2 Find the area and perimeter of Rectangle as l=7.8 km , B=8.1cm​

Answer 1

Answer:

Given,

Length=7.8km

Breadth= 8.1 km

We know ,

Perimeter =2(l+b)

=2(7.8+8.1)km

=2×15.9 km

=31.8km

Area=l×b

=7.8 ×8.1 km²

=63.18 km²

(Note:If you breadth is really 8.1 cm not km , then with the same formula,

Perimeter =15616.2 cm

Area =63180 cm²)

Answer 2

Answer:

From the definition of the perimeter we know, the perimeter of a rectangle, P = 2 ( a+b) units

where

“a” is the length of the rectangle

“b” is the breadth of the rectangle

Derivation of Perimeter of Rectangle

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

please drop some ❤️❤️❤️

Step-by-step explanation:

please f-o-l-l-o-w m-e bro please