Question

length of a rectangle is three more than twice its breadth if perimeter of that rectangle is 42 cm .Find dimensions of the rectangle​

Answer 1

Step-by-step explanation:

breadth = x

length = 2x + 3

perimeter of a rectangle = 2(l+b)

so, perimeter, 42cm = x + 2x+3

42 = 3x + 3

42-3= 3x

39 = 3x

39/3 = x

13 = x

therefore, length = 2×13+3 = 29cm

breadth = 13cm

Answer 2

Answer:

Step-by-step explanation:

Let breadth of rectangle be x cm

Then length of rectangle =2x+3

Given that perimeter of the rectangle = 42cm

Then 2(2x+3+x)=42

6(x+1)=42

X+1=7

Then x=6 cm

Therefore breadth of rectangle =6cm

and length of rectangle = 2×6+3=15 cm