Question

the side of rectangle are in the ratio 3:5 what is the length of it's side if the perimeter is 64cm​

Answer 1

Step-by-step explanation:

take 3=3x

and 5=5x

perimeter=2×(L+B)

64=2×(3x+5x)

64=2×8x

64=16x

x=4cm

1st side =3×4=12cm

2nd side=5×4=20cm

Answer 2

Answer:

4

Step-by-step explanation:

L = 3x

B = 5x

$perimeter \: of \: rectngle \: = 2(l + b) \\ 64 = 2(l + b) \\ 64 = 2(3x + 5x) \\ 64 = 2(8x) \\ 64 = 16x \\ x = \frac{64 }{16} \\ x = \frac{8 }{2} \\ x = 4$