the sides of a rectangle are in the ratio of 4:5. find its sides it perameter is 90cms?

Answer 1

Let sides be x cm and y cm
2 (x + y) = 90
2(x + 5x/4) = 90
9x/4 = 45
x/4 = 5
x = 20
y = 25

Sides are 20cm and 25cm

Answer 2

Sides of rectangle
4:5 ratio
perameter 90cm
Four sides to a rectangle, so times ratio total 2 sides(4+5=9)by two(9x2=18) so 18 parts to perameter.
one part(90cm/18=5) equals 5cm
Length is longest side and 5 parts(5x5cm=25cm) equals 25cm
Width is the shortest side and 4 parts(4x5cm=20cm) equals 20cm

Answer 3

assume x be comman ratio of L and B,
so
given:
ratio=4x:5x
2(4x+5x)=90;
18x=90
x=5
sub in ratio
so that sides of trgales are 20,25

Answer 4

l = length
b = breadth
Perimeter= 2(l +b) = 90cm
l+b = 45 (#)
l/b = 5/4 (length > breadth)
Let l be 5x and b be 4x
So,
l+b = 45 (#)
5x +4x = 45
9x = 45
x = 5
Length = 5x = 5*5 = 25cm
Breadth = 4x = 4*5 = 20 cm

Answer 5

Letting 4x and 5x be the sides, then 2(4x+5x)=90, or 9x=45, so x=5.
So,, its (4*5) and (5*5) or 20 by 25.

Answer 6

Let's see...
If their ratio is 4:5, it means we can say that the sides are
a=4z, and b=5z . (z being an unknown number)
The rectangle has 4 sides, so it's perameter is or 2x (a+b) or in this case we can say 2x(4z+5z).
This means that 90 = 2x9z =18z=> z=5.
The sides are therefore a=4z=20 and b=5z=25

Answer 7

Let the sides be 4k and 5k as they are in the ratio 4:5
∴ Perimeter = 2*(4k+5k) = 18k = 90 which means k = 5
Hence the sides are w=20 cm and l= 25cm.

Answer 8

then sides are 4/2(4+5)*90cm and 5/2(4+5)*90cm
or 20cm and 25cm

Answer 9

perimeter is 90
half the perimeter is 45
the sides are 45(4/9)=20 and the other is 25cm

Answer 10

Let lenght = l and Breadth = b
Perimeter = 2l + 2b = 90cms
=> 2(l + b) = 90 / 2
=> l+ b = 45 cms
Now l = 4/9*45 = 4*5 = 20 cms
b = 5/9*45 = 5*5 = 25 cms