Question

The sides of the rectangle are in the ratio 3:5 .find its side if the perimeter is 160 cm

Answer 1

Let the sides be 3x and 5x.

$2(3x + 5x) = 160 \\ \\ = 2 \times 8x = 160 \\ \\ = 16x = 160 \\ \\ \\ x = \frac{160}{16} = 10 \\ \\ \\ \\ 3x = 3 \times 10 = 30 \\ \\ 5x = 5 \times 10 = 50$

30 cm and 50 cm are the sides of the rectangle.

Answer 2

Here is your solution

Given :-
ratio 3:5 .find its side if the perimeter is 160 cm


Let,
the sides be 3x and 5x.

perimeter of rectangle =2 (l+b)

=>160=2(3x+5x)
=>160=2×8x
=>16x=160
=>x=10

breadth =3x=3×10=30
length =5x=5×10=50​


30 cm and 50 cm are the sides of the rectangle.
hope it helps you