Question

the sides of a rectangle are in the ratio 5:4 and its perimeter is 90 cm find its length and breadth​

Answer 1

Answer:

let the ratio be x

perimeter = 2 (l+b)

90=2×(5x+4x)

45=9x

x=5

5x=5×5=25

4x=4×5=20

so ,length is 25 cm

breadth is 20cm

Answer 2

Answer:

let the length of rectangle =5x

and, the breadth of rectangle =4x

according to question,

perimeter of rectangle =90 cm

2(l+b)=90

2(5x+4x)=90

18x=90

x=5cm

hence, length =5x

=5*5

=25cm

breadth =4x

=4*5

=20cm

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