Question

12. The sides of a rectangle are in the ratio 5:4 and its perimeter is 90 cm. Find its lengan
breadth.​

Answer 1

Answer:

Let length be 5x and breadth be 4x.

$Perimeter\ of\ Rectangle=2(length+breadth)\\\\=>90=2(5x+4x)\\=>90=2(9x)\\=>90=18x\\=>x=90/18=5\ cm$

∴ Length = 5x = 25 cm

Breadth = 4x = 20 cm

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Answer 2

let the l and b be 5x and 4x

et the l and b be 5x and 4xATQ

• et the l and b be 5x and 4xATQ2(5x + 4x)= 90
• et the l and b be 5x and 4xATQ2(5x + 4x)= 9010x + 8x = 90
• et the l and b be 5x and 4xATQ2(5x + 4x)= 9010x + 8x = 9018x =90
• et the l and b be 5x and 4xATQ2(5x + 4x)= 9010x + 8x = 9018x =90x = 90/18
• et the l and b be 5x and 4xATQ2(5x + 4x)= 9010x + 8x = 9018x =90x = 90/18 x = 5

et the l and b be 5x and 4xATQ2(5x + 4x)= 9010x + 8x = 9018x =90x = 90/18 x = 5length = 5 x 5

et the l and b be 5x and 4xATQ2(5x + 4x)= 9010x + 8x = 9018x =90x = 90/18 x = 5length = 5 x 5 = 25cm

et the l and b be 5x and 4xATQ2(5x + 4x)= 9010x + 8x = 9018x =90x = 90/18 x = 5length = 5 x 5 = 25cmbreadth = 4 x 5

et the l and b be 5x and 4xATQ2(5x + 4x)= 9010x + 8x = 9018x =90x = 90/18 x = 5length = 5 x 5 = 25cmbreadth = 4 x 5 =20 cm