the sides of a rectangle are in the ratio 4;5 and its perimeter is 90 cm. find the dimensions of the rectangle and its area.
Answers
Answered by
4
Answer: length = 20 cm ; breadth = 25 cm;
Area = 500 cm²
Step-by-step explanation:
length : breadth = 4 : 5
length = 4x , breadth = 5x
Perimeter = 2*(length + breadth) = 90
2*(4x+5x) = 90
2*9x = 90
x = 90/9*2 = 5
length = 4*5 = 20 cm
breadth = 5*5 = 25 cm
Area = length*breadth = 20*25 = 500 cm²
Answered by
2
YOUR ANSWER...
let the sides be x
one side=4x
another side=5x
PERIMETER OF RECTANGLE=2(l+b)
90=2(4x+5x)
90=2(9x)
90=18x
x=90÷18
x=5 cm
one side=4x=(5*4)=20cm
another side=5x=(5*5)=25cm
AREA OF RECTANGLE=l*b
=25*20
=500cm square
MARK AS BRAINIEST ❤
let the sides be x
one side=4x
another side=5x
PERIMETER OF RECTANGLE=2(l+b)
90=2(4x+5x)
90=2(9x)
90=18x
x=90÷18
x=5 cm
one side=4x=(5*4)=20cm
another side=5x=(5*5)=25cm
AREA OF RECTANGLE=l*b
=25*20
=500cm square
MARK AS BRAINIEST ❤
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