Question

The length of a rectangle is 3 times its breadth. If the perimeter is 84 m, find the length of the rec tangle

Answer 1

84 = 2(l+b)

84 = 2( l + l/3)

42 = 4l/3

l = 126/4

l = 31.5 m

Answer 2

Answer:

Let the breadth of the rectangle be x

Then

Length = 3x

Now,

2 ( 3x + x ) = 84

4x = 42

x = 42 / 4

x = 21 / 2

Hence breadth is 21/2m

Length = 3 × 21 / 2 = 63/2m

Thanks! ❤