Question

the side of a rectangle are in the ratio 5:4 and its perimeter is 90 cm. find its length and braeth​

Answer 1

Answer:

let the sides be 5x and 4x cm.

so perimeter of rectangle= 2*(length + breadth)

90 = 2 *(5x + 4x)

90 = 2 * 9x

therefore x = 5 cm

length = 5*5=25 cm

breadth = 4 * 5 = 20 cm

Answer 2

Answer:

Step-by-step explanation:

Let the length be 5x and breadth be 4x

perimeter= 2(l+b)

90 cm = 2(5x+4x)

90 cm= 2×9x

90cm= 18x

90cm/18= x

therefore x = 5cm

therefore: length = 5x = 5×5cm

                                    = 25 cm

breadth= 4x = 4 × 5cm

                   = 20 cm