Question

14) If the perimeter of rectangle is 100cm.If the length
is 40cm. Find it's breadth.​

Answer 1

Question⤵

If the perimeter of rectangle is 100cm.If the length is 40cm. Find it's breadth.

Answer⤵

Given : perimeter of rectangle = 100cm

and lenght of rectangle = 40cm

Find : it's breadth

Sol :- perimeter of rectangle = 2(l+b)

$100cm= 2(40cm+ b) \\ 100cm = 80cm + 2b \\ 100cm - 80cm = 2b \\ 20cm = 2b \\ 20cm \div 2 = b \\ 10cm = b$

so, breadth of rectangle is 10cm

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Answer 2

Answer:

The breadth of the rectangle = 20/2cm = 10cm.

Step-by-step explanation:

We know that, the perimeter of any rectangle = 2(length + breadth)

According to the problem:

100cm = 2(40cm + breadth)

=>2 times the breadth = (100 - 80)cm = 20cm

=>The breadth of the rectangle = 20/2cm = 10cm.