Question

the perimeter and breadth of a rectangle are 30 cm and 4 cm, respectively. find its area?​

Answer 1

Answer:

$fromula \: of \: area \: of \: rectangle \: = l \: \times b \\ \\ then \: l = 30cm \: . \: b = 4cm \\ \\ therefore \: area \: = 30cm \times 4 cm.\\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = 120sq.cm$

Answer 2

Answer:

Length=11cm

Area=44cm²

Step-by-step explanation:

Perimeter of rectangle=2( l + b )

We have been given:

Perimeter=30cm

Breadth=4cm

Let length be = x

Using formula and inserting the values:

30cm=2( x +4 )

30cm/2=x + 4

15cm=x + 4

15 - 4 = x

11 = x

Length=11cm

Area of rectangle= l × b

l=11cm

b=4cm

Using the formula and inserting the values:

11 × 4= 44cm²

Area=44cm²