Table of Contents
- 1 What is the change in the area of a rectangle when length increases by 10\% and width decreases by 10\%?
- 2 What is the percentage change in the area a rectangle when its length increases by 10\%?
- 3 What is change in area of rectangle?
- 4 What is the percentage change in the area of a rectangle if the length is increased by 5\% and the breadth is decreased by 5 \%?
- 5 What is the percentage increase in the area of a rectangle if each of its sides?
- 6 What is the percentage increase in the area of rectangle?
- 7 What is the formula for reducing the length of a rectangle?
- 8 How does changing the length of a figure affect its perimeter?
What is the change in the area of a rectangle when length increases by 10\% and width decreases by 10\%?
Area of a rectangle = length × width = 100 × 100 = 10,000 sq units. The length increases by 10\%; the new length will be 100 + 10\% of 100 = 110 units. The width decreases by 10\%; the new width will be 100 – 10\% of 100 = 90 units. Therefore, new area = 110 × 90 = 9900 sq units.
What is the percentage change in the area a rectangle when its length increases by 10\%?
so the new area is 99\% of A .
What is the percentage increase in area when the sides of a rectangle are increased in length by 100?
Since sides are increased by 100 \% therefore increased sides would be 2X, 2Y respectively. Increase in Area in \% = (4XY/XY) × 100 = 400 \% Ans.
What is the percentage increase in the area of a rectangle if the sides are increased by 20?
So, we have found the percentage increase in area as 44\%. So, the correct answer is “Option c”.
What is change in area of rectangle?
Since the area of the rectangle is given by the formula: area = length * breadth. Let the initial length of the rectangle be L and the breadth of the rectangle be B. Therefore, the initial area is given by L * B. Therefore, the new length and breadth are given as: L’ = L + ((P/100)*L) B’ = B + ((Q/100)*B)
What is the percentage change in the area of a rectangle if the length is increased by 5\% and the breadth is decreased by 5 \%?
Hence, the area of the rectangle decrease by -0.25 \%.
What is percentage change in area of rectangle?
Let the initial length of the rectangle be 100 and breadth be 80. Initial area = 8000. New length = 110 and new breadth = 96. Therefore, the new area = 10560. The percentage change in the area = ((10560 – 8000) / 8000) * 100 = 32.
What is the percentage increase in the area of rectangle if the sides are increased by 25\%?
New Area =(6/5x × 6/5y)m2=(36/25xy)m2. Hence, Increase \% =(11/25xy × 1/xy × 100)\%= 44\%.
What is the percentage increase in the area of a rectangle if each of its sides?
Ans. Increase in the area of the rectangle is 44\%. After 20\% increase in Length and Breadth, (120/100*L)*(120/100*B) = 144/100*LB . Hence, increase in area = 144/100*LB – LB = 44/100*LB = 44\% Ans.
What is the percentage increase in the area of rectangle?
Discussion :: Area – General Questions (Q. No. 4)
| Increase \% = | 11 | \% |
|---|---|---|
| 25 |
How do you find the increase in area?
To calculate the percentage increase:
- First: work out the difference (increase) between the two numbers you are comparing.
- Increase = New Number – Original Number.
- Then: divide the increase by the original number and multiply the answer by 100.
- \% increase = Increase ÷ Original Number × 100.
How do you calculate the area of a rectangle?
For example, the area for a rectangle may be calculated using A = LW, where the length L is multiplied by the width W. This means that if we reduce L by 2, we’ll actually reduce the area by two times the width W, since ( L – 2) W = LW – 2 W. All right, let’s take a moment or two to review.
What is the formula for reducing the length of a rectangle?
A brief look at the formula tells us that P will also become an inch shorter. What if I reduce the length of a rectangle by one inch? The formula for the perimeter of a rectangle is P = 2 L + 2 W. Notice that our length L term is being multiplied by 2, so the perimeter will lose two inches when we make L one inch shorter.
How does changing the length of a figure affect its perimeter?
Lesson Summary. Changing one of the dimensions, such as length or width, of a figure can have a significant impact on the figure’s perimeter (total length of the edge) and its area (size of the surface). You can determine what the effect will be by looking at any figure’s perimeter and area formulas to calculate the size of the result.
How many square feet is a rectangular bedroom 12×15?
A rectangular bedroom with one wall being 15 feet long and the other being 12 feet long is simply 12 x 15 = 180 square feet. Since in multiplication the order in which the numbers are multiplied does not matter, you need not worry about switching the places of the two measurements.