Question

The perimeter of a rectangle is 142 cm. then find.
breadth if length is 51 cm​

Answer 1

Answer: 20cm

Step-by-step explanation:

The perimeter of a rectangle = 2*(l+b) = 142cm

(l+b) = 142/2 = 71cm

Breadth = b = 71 - l = 71 - 51 = 20cm

Answer 2

Answer:

perimeter = 2(l+b)

142= 2(51+b)

142=102+2b

142-102= 2b

40=2b

B=40/2

B=20