Percentages + expression of a variable from the formula - practice problems - page 3 of 11
Number of problems found: 217
- Percentage 66684
Prism with square base a=25cm, height h=45cm. cube: b=15cm a) what percentage of the volume of the prism is the volume of the cube? b) what height should the prism have to have the same volume as the cube? - Increase 65794
The area of the square is 36 cm². What will be the area of the square if we increase the length of a side by 25%? - Parallelogram 64414
The parallelogram has side a = 58cm and diagonals u = 89cm, v = 52cm. Calculate the perimeter and area of this parallelogram. - Original 63974
If we reduce the length of the cube edge by 30%, this cube has a reduced surface area of 1176 cm². Find the edge length and volume of the original cube.
- Cosine
Cosine and sine theorem: Calculate all missing values (sides and angles) of the triangle ABC. a = 20 cm; b = 15 cm; γ = 90°; c =? cm; α =? °; β =? ° - Bronze
Bronze has 80% copper and 20% tin. How much copper will we need to produce bronze if we have 39kg of tin? - Discount
If someone gives you a discount on "X" at 5% for 60 days. Then the discounted amount is 80000. find the actual amount? Discounted Amount=80000 rate=5% Period=60 days Actual amount=? - The ratio 4
The ratio of two numbers is 5:4. If 40% of the first number is 12, what will be 50% of the second number? - Cost structure
You are currently trying to decide between two cost structures for your business: one with a greater proportion of short-term fixed costs and another more heavily weighted to variable costs. Estimated revenue and cost data for each alternative are as foll
- The pool
There is 210 l of water in the pool. If you know that the pool is 30% full, calculate how many liters of water will fit into it. - Circumference 47903
The rectangle's length is 35% larger than its width, and the circumference is 188 cm. Calculate its area. - Determine 46401
The volume of the sphere is 20% larger than the volume of the cone. Find its surface if the volume of the cone is 320 cm³. - Height and base
An isosceles triangle has an area of 168 cm², and its added height and base are 370 cm. What are the measurements of its height and base? - Metal washers
Metal washers with a diameter of 80 mm are cut from a strip of steel sheet with a width of 10 cm and a length of 2 m. When two adjacent circles meet, calculate the material waste percentage if no material is lost.
- Graduates 40111
As many as 62.5% of residents at the business academy graduated with honors. How many high school graduates were there if 30 students graduated with honors? - Pharmacist
The pharmacist had a 12 liters vessel herbal lotion, which contained a 30% active ingredient. Her assistant poured 18 liters of herbal lotion containing 45% of the active ingredient into a container. What percentage of herbal lotion was produced? - Percentage 39403
Romeo is 20% taller than Juliet. What percentage is Julie lower than Romeo, who measures 180 cm? - Solution 38411
Prepare 250g of a 30% solution of hydrogen peroxide in water. - Solution 38391
Prepare 100g of a 15% blue rock solution.
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