1.

the sides of a rectangle are in the ratio 3:2 If it's perimeter is 40cm then find its length of a triangle​

Answer»

GIVEN :

  • Sides : Ratio of 3:2

  • Perimeter : 40cm

To Find :

  • Length

Solution :

We know how to find the perimeter of a RECTANGLE :

➜ 2( l + b)

PUTTING up the VALUES we get :

➜ 40 = 2( 3x + 2x)

➜ 40 = 2×5x

➜ 40/2 = 5x

➜ 20 = 5x

➜x = 20/5

➜x = 4

When x = 4 ;

we need to substitute value of x in the ratios :

3x = 3×4 => 12cm

2x = 2×4=> 8cm

So the length: 12cm and BREADTH : 8cm

Let's verify the answer :

➜2( l + b)

➜ 2(12 + 8) = 40

➜ 2×20 = 40

➜ 40 = 40

LHS = RHS



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