Question

25 years, 45 years
d. 5 years, 30 years
If the perimeter of a rectangle is 100 cm and its length (l) is 20. сm more than its
breadth (b), find its length and breadth.​

Answer 1

Step-by-step explanation:

Perimeter = 100cm

Breadth(b) = b

Length(l) = 20cm + b

Perimeter of a rectangle = 2(l+b)

100 = 2(20+b + b)

100 = 40+2b + 2b

100 = 40 + 4b

100 - 40 = 4b

60/4 = b

15 = b

Breadth = 15cm

Length = 20 +b = 20 + 15 = 35cm

Recheck:-

Perimeter of a rectangle = 2(l+b)

=> 2(35+15)

=> 2 x 50

=> 100cm