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Fiesta28 [93]
2 years ago
6

Please solve

Mathematics
1 answer:
lisov135 [29]2 years ago
7 0

Let lebgth be x

  • Breadth=3x/4

\\ \rm\Rrightarrow Perimeter=2(L+B)

\\ \rm\Rrightarrow 2(x+\dfrac{3x}{4})=140

\\ \rm\Rrightarrow 2\left(\dfrac{4x+3x}{4}\right)=140

\\ \rm\Rrightarrow 2\left(\dfrac{7x}{4}\right)=140

\\ \rm\Rrightarrow \dfrac{14x}{4}=140

\\ \rm\Rrightarrow 14x=140(4)

\\ \rm\Rrightarrow 14x=560

\\ \rm\Rrightarrow x=\dfrac{560}{14}

\\ \rm\Rrightarrow x=40

  • Length=40cm
  • Breadth=3(40)/4=120/4=30[
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