Question

7. Perimeter of a rectangle is given 30 cm. If breadth is given as 'a' and length is 9 cm. Find its breadth







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Answer 1

Given :

Length of rectangle = 9 cm

Perimeter of rectangle = 30 cm

To find :

Breadth of rectangle

According to the question,

★ Perimeter of rectangle = 2(Length + Breadth)

l stands for Length

b stands for Breadth

Let the breadth of rectangle be x

→ 30 cm = 2(9 cm + x)

→ 30 cm ÷ 2 = 9 cm + x

→ 15 cm = 9 cm + x

→ 15 cm - 9 cm = x

→ 6 cm = x

.°. x = 6 cm

So,the breadth is 6 cm...

_________

★ Verification :

→ Perimeter of rectangle = 2(Length + Breadth)

→ 30 cm = 2(9 cm + 6 cm)

→ 30 cm = 2(15 cm)

→ 30 cm = 30 cm

.°. L.H.S = R.H.S

Hence,verified !