the volume of a cuboid is 3600 square meter cube and its height is 12 cm. the cross section is a rectangle, whose lenght and breadth are in ratio 4:3. find the perimeter of the cross section.

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Solution

The length and breadth are in the ratio 4:3.
Let length,l =4x
and breadth, b =3x
Given h= 12 cm
Given volume = 3600
lbh=3600
4x3x12=3600
144x²=3600
x²=25
x=5
So, l = 4x=20 cm and b=3x= 3*5=15 cm
Perimeter = 2(l+b)= 2(20+15)=70 cm

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the volume of a cuboid is 3600 square meter cube and its height is 12 cm. the cross section is a rectangle, whose lenght and breadth are in ratio 4:3. find the perimeter of the cross section.

The length and breadth are in the ratio 4:3. Let length,l =4x and breadth, b =3x Given h= 12 cm Given volume = 3600 lbh=3600 4x*3x*12=3600 144x2=3600 x2=25 x=5 So, l = 4x=20 cm and b=3x= 3*5=15 cm Perimeter = 2(l+b)= 2(20+15)=70 cm

The length and breadth are in the ratio 4:3.
Let length,l =4x
and breadth, b =3x
Given h= 12 cm
Given volume = 3600
lbh=3600
4x3x12=3600
144x²=3600
x²=25
x=5
So, l = 4x=20 cm and b=3x= 3*5=15 cm
Perimeter = 2(l+b)= 2(20+15)=70 cm