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The length of a rectangle is twice its b...

The length of a rectangle is twice its breadth and its area is 288 `cm^(2)`.
Find the dimensions of the rectangle.

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To find the dimensions of the rectangle, we can follow these steps: ### Step 1: Define the variables Let the breadth of the rectangle be \( B \) cm. According to the problem, the length \( L \) is twice the breadth. Therefore, we can express the length as: \[ L = 2B \] ### Step 2: Write the formula for the area of the rectangle The area \( A \) of a rectangle is given by the formula: \[ A = L \times B \] We know from the problem that the area is \( 288 \, cm^2 \). Substituting the expression for length into the area formula, we get: \[ A = (2B) \times B = 2B^2 \] ### Step 3: Set up the equation Now, we can set up the equation using the area: \[ 2B^2 = 288 \] ### Step 4: Solve for \( B^2 \) To isolate \( B^2 \), divide both sides of the equation by 2: \[ B^2 = \frac{288}{2} = 144 \] ### Step 5: Find \( B \) Now, take the square root of both sides to find \( B \): \[ B = \sqrt{144} = 12 \, cm \] ### Step 6: Find \( L \) Now that we have the breadth, we can find the length using the relationship \( L = 2B \): \[ L = 2 \times 12 = 24 \, cm \] ### Conclusion The dimensions of the rectangle are: - Breadth \( B = 12 \, cm \) - Length \( L = 24 \, cm \)

To find the dimensions of the rectangle, we can follow these steps: ### Step 1: Define the variables Let the breadth of the rectangle be \( B \) cm. According to the problem, the length \( L \) is twice the breadth. Therefore, we can express the length as: \[ L = 2B \] ...
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RS AGGARWAL-QUADRATIC EQUATIONS -Exercise 4E
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