Question

4. The area of a rectangle is 520 cm'. Find
(a) the length if its width is 20 cm.
(b) the perimeter of the rectangle.​

Answer 1

Answer:

(a) Length=26 cm

(b) Perimeter =92 cm

Step-by-step explanation:

Area=520 cm^2

breadth=20 cm

a)Area=length×breadth

Length=Area/breadth

=520/20

Length=26 cm

b)Perimeter =2(l+b)

=2(26+20)

=2×46

Perimeter=92 cm

Answer 2

Answer:

(a) 26 cm

(b) 92 cm

Step-by-step explanation:

(a) Area of rectangle => l × b = 520 cm²

=> 20 × b = 520

=> b = 520/20

=> b = 26 cm

(b) Perimeter of rectangle => 2(l+b)

=> 2(20+26)

=> 2×46

=> 92 cm