Area of a shape + percentages - practice problems
Number of problems found: 200
- The radius 2
The radius of a circle is increased by 5%. What is the percentage increase in their circumference area? - Joey had
Joey had 70% of his money in a savings account. The rest of his money was in a cheque account. (a). What percentage of his money was in his cheque account? (b). He had $240 in his cheque account. How much money did he have in his savings account? - Square
If we increase the side of the square, increase its area of 91%. What is the percentage we increase the side of the square? - CZ flag
What percentage of the Czech flag comprises blue, white, and red textiles? - One-fifth 80438
By what percent does the area of a square increase if its perimeter increases by one-fifth? - Area decrease
If the area of the square decreases by 19%, by how much percent does the side of the square decrease? - Percentage 4138
What percentage does the white color on the Czech flag occupy? - Pipeline
How much percent has changed (reduced) the pipe cross-section area if the circular shape changed to square with the same perimeter? - Percentage 58703
In the park, with an area of 1413 m2, there is a circular fountain with a diameter of 6 m. What percentage of the park does the fountain occupy? - Isosceles triangle
Find the area of an isosceles triangle whose leg is twice the base, b=1 - Screens
The area of a 25-inch TV screen is 300 inch² the area of a 40-inch TV screen is 768 inch². The area of the smaller screen is what percent of the area of the larger screen? - Cutting square
We cut the circle with the highest possible diameter from a square with a side of 30 cm. How many percents of the square area is this circle? - Diameters of circles
How many percent of the area of a larger circle is a smaller circle if the smaller circle has a diameter of 120 mm and a larger one has a diameter of 300 mm? - Percentage of waste
In a square plate with a side 75 cm, we cut four same circles. Calculate the percentage of waste. - Parcel
Both dimensions of the rectangular parcel were increased by 31%. By how much % has it increased its acreage? - Equilateral triangle
Calculate the side of an equilateral triangle if its area is 886 mm². - Reduced 81099
A square has a side length of 25 cm. How big is its area if the side is reduced by 25%? - Diameter 6289
A circle with the largest possible diameter is cut from a square with a side length of 35 cm. What percent of the square area is waste? - Percent change
The length of a rectangle is increased by 25%, and the width is decreased by 10%. By what percent is the area of the rectangle larger than the area of the original rectangle? - Expansion
If one side of the rectangle is larger 2-times and the second 4-times, what percentage increases the area of the rectangle?
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