Question

perimeter of rectangle is 180 metre and its length is 10 metre more than its width find the length and with the answer NCERT solution​

Answer 1

Answer:

perimeter of rectangle is 2 ×(l + b)

→ 2 × (x + x +10) = 180

→ 2 × (2x + 10) = 180

→ 2x + 10 = 180/2

→ 2x + 10 = 90

→ 2x = 90 - 10

→ 2x = 80

→ x = 80/2

→ x = 40m

Answer 2

Answer:

Length of the rectangle is 50 m.

Explanation:

Given :-

• Perimeter of rectangle is 180 m and its length is 10 m more than its width.

To find :-

• Length of the rectangle.

Solution :-

Consider,

• Width of the rectangle = x m

★ Its length is 10 m more than its width.

Then,

• Length of the rectangle= (x+10) m

Formula used :-

${\boxed{\sf{Perimeter\:of\: rectangle=2(length+Width)}}}$

According to the question,

2 (x+10+x) = 180

→ 2(2x+10) = 180

→ 2x+10 = 90

→ 2x = 90-10

→ 2x = 80

→ x = 40

• Width of the rectangle = 40 m

Therefore,

★ Length of the rectangle = (40+10) = 50 m