Question

the length of a rectangle is 3 less than the twice of its breadth. the perimeter of rectangle is 42cm.then find the length and breadth of rectangle.

Answer 1

mate .... aswer is herereeere

Answer 2

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The length of a rectangle is 3 less than the twice of its breadth. The perimeter of rectangle is 42cm.

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Length and breadth of Rectangle

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Let the :-

Breadth (b) = 'x' cm

Then,

Length (l) = (2x - 3) cm. ---(1)

Now,

Perimeter of Rectangle = 42

We know that,

Perimeter of Rectangle = 2(l + b)

So,

➵ 2(l + b) = 42

➵ ( l + b) = 42/2 = 21

➵ (2x - 3) + x = 21. ----from (1)

➵ 2x + x = 21 + 3

➵ 3x = 24

➵ x = 24/3 = 8

Hence,

• Length of Rectangle = (2x - 3) = 2×8 - 3 = 16-3 = 13 cm

• Breadth of Rectangle = x = 8 cm

MORE FORMULAS :-

• Area of Rectangle = l × b

• Perimeter of Rectangle = 2(l + b)

• Diagonal of Rectangle = √l² + b²