Question

the length of a rectangle is y cm and its breadth is (y-5) cm. If it's perimeter is 18 cm, find the value of y​

Answer 1

Answer:

Y=7cm

Step-by-step explanation:

18=2(l+b)

18=2(y+y-5)

18=2(2y-5)

18=4y-10

28=4y

Y=7cm

Length=7cm

Breadth=2cm

Answer 2

Step-by-step explanation:

given:

length of rectangle (l) = y cm

length of its breadth (b) = (y -5) cm

perimeter of rectangle = 18cm

To find:

find value of y

Finding:

perimeter of rectangle = 18cm

2(l+b) = 18

2(y+y-5) = 18

4y -10 = 18

4y = 28

y = 7 cm

length of rectangle (l) = y cm = 7 cm

length of its breadth (b) = (y -5) cm

= 7- 5 =2cm

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