Question

The perimeter of a rectangle is 40 m. The length of the rectangle is 4 m less than 5 times
its breadth. Find the length of the rectangle​

Answer 1

Answer:

Lenght = (5 × 6 - 4)m

= (30 - 4)m

= 24m

Step-by-step explanation:

Let the breath be 'b'm.

Length(l)= (5b - 4)m

$2 \times (l + b) = 40 \\ = 2(5b - 4 + b) = 40 \\ = 4b - 4 = \frac{40}{2} \\ = 4(b - 1) = 20 \\ = b - 1 = \frac{20}{4} \\ = b - 1= 5 \\ = b = 5 + 1 \\ = b = 6$