Question

the perimeter of a rect is 90m if the length of a rectangle 39m find breadth of rectangle

Answer 1

Hiiii there!!!

Perimeter (P)= 90m
Length (L)= 39m
Let the breadth be B
P= 2( L+B)
90= 2(39+B)
39+B= 90/2
B= 45- 39= 6 m ANS

Hope it helps.....

Answer 2

Let’s consider an example:
If length of a rectangle is 10 cm and its perimeter is 22 cm, then find its breadth.
Given length, l = 10 cm and perimeter = 22 cm
We know that perimeter of rectangle = 2 (l + b) units
22 = 2(10 + b)
⇒ 10 + b = 11
⇒ b = 1 cm
Hence breadth of the rectangle is 1 cm.
In general, perimeter of rectangle P = 2(l + b)
(P/2) = l + b
⇒ b = (P/2) – l
Using above formula also you can directly find the value of breadth.