A wire is 72 cm long.It is bent to form a rectangle. The ratio of its length to its breadth is 7:5. Find the area of the rectangle.
Answers
Answered by
17
Let the number be 7x and 5x
So,
2(7x + 5x) = 72
2 * 12x = 72
24x = 72
X = 72/24
X = 3
So, the numbers are ( 7 * 3) = 21
And, (5 * 3) = 15
So, area = length x breath
= 21 cm * 15 cm
= 315 cm square
Hope it helps...!!!
So,
2(7x + 5x) = 72
2 * 12x = 72
24x = 72
X = 72/24
X = 3
So, the numbers are ( 7 * 3) = 21
And, (5 * 3) = 15
So, area = length x breath
= 21 cm * 15 cm
= 315 cm square
Hope it helps...!!!
Tanisgq:
U should find area also!☺
sorry I forgot
now it is done
Answered by
11
Perimeter of rectangle=72 cm
Let the rario be 7x and 5x
2(l+b)=72
2(7x+5x)=72
2(12x)=72
24x=72
x=72/24
x=3 cm
Therefore,
l=7x=7×3=21cm
b=5x=5×3=15cm
Area of rectangle=l×b
=21×15=315 cm^2
Let the rario be 7x and 5x
2(l+b)=72
2(7x+5x)=72
2(12x)=72
24x=72
x=72/24
x=3 cm
Therefore,
l=7x=7×3=21cm
b=5x=5×3=15cm
Area of rectangle=l×b
=21×15=315 cm^2
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