Question

m + 9 = 20,then find the value of 9 m-80 *​

Answer 1

Answer:

Required Answer:

✒️ GiveN:

Length of the rectangle is twice it's breadth.

Perimeter of the rectangle = 180 m

✒️ To FinD:

Area of the rectangle.....?

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✤ How to solve?

We can solve this question by using the perimeter and area of the rectangle formula that is,

Perimeter of the rectangle ➙ 2(l + b)

Area of the rectangle ➙ l×b

Here,

l = length

b = breadth..

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✤ Solution:

We have,

Length = 2(Breadth)

Let,

Breadth of the rectangle be x, then length would be 2x.

We have, Perimeter

➝ 2(2x + x) = 180 m

➝ 2(3x) = 180 m

➝ 6x = 180 m

➝ x = 180/6 m = 30 m

Then,

Length of the rectangle = 2 × 30 m = 60 m

Breadth of the rectangle = 30 m

Finding the area,

➝ l × b

➝ 60 m × 30 m

➝ 1800 m²

✍️ Area of the rectangle = 1800 m²

Answer 2

$m + 9 = 20 \\ \\ m = 20 - 9 \\ \\ m = 11 \\ \\ now \\ \\ 9m - 80 = 9(11) - 80 = 99 - 80 = 19$

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