Ratio + percentages - practice problems - page 4 of 6
Number of problems found: 119
- Inscribed sphere
How much % of the volume of the cube whose edge is 6 meters long is a volume of a sphere inscribed in that cube? - Lathe
Calculate the percentage of waste if the cube with 53 cm long edge is lathed to the cylinder with a maximum volume. - Metal alloy
What is the metal ratio in the alloy in the 50 tonnes of steel to 30 kg nickel? - Climb in percentage
The height difference between points A and B is 475 m. Calculate the percentage of route climbing if the horizontal distance between places A and B is 7.4 km. - Trousers
Jarek bought new trousers, but the trousers were too long. Their length was in the ratio of 5:8 to Jarek's height. The mother cut his trousers by 4 cm. Thus, the original ratio decreased by 4%. Determine Jarek's high. - Ratio three numbers
Three numbers SUV are in the ratio 2:3:4. Their sum is 90. Find these numbers and write their add and sum. - Speedometer
The speedometer of a car reads 66 km/h. It's accurate to within 4.1% What is the maximum possible error? - Carpenter
A carpenter cut off a small cuboid block with half the edge length from a wooden block. How many percent of wood did he cut off? - Bureaucracy
23 people attended the office. 9 of them completed the questionnaire. What is the percentage of all people? - Mushrooms
Fresh mushrooms contain 94% water and dried 11%. How many kilograms of fresh mushrooms are needed to collect to get 8 kg dried? - Louvers
The company charges for office equipment louvers total 262 Eur. From the delivery, the bill is obvious that the louvers are 76 Eur more expensive than their installation. What percentage of the total charged is the installation of louvers? - Balls
Ping pong balls have a diameter of approximately 4 cm. It is sold in boxes of 9 pieces: each box has a cuboid shape with a square base. The balls touch the walls of the box. Calculate what portion of the internal volume of the box is filled with balls. - Tanks
The fire tank has a cuboid shape with a rectangular floor measuring 13.7 m × 9.8 m. Water depth is 2.4 m. Water was pumped from the tank into barrels with a capacity of 2.7 hl. How many barrels were used if the water level in the tank fell 5 cm? Wri - Dices
We will throw two dice. What is the probability that the ratio between numbers on the first and second dice will be 1:2? - Saving
Gejza save € 1470 to buy a car. Yet it lacks save 45% of the car price. How much is the car? - Fertilizer
Mr. Gherkin uses for fertilization 10% solution of fertilizer. 5 liters of it still left. How much water must be added to the solution to make only the 7% solution? - Suit
The suit cost 119 euros. How much cost the pants if it is 50% cheaper than the jacket? - Inheritance
After death, the father (♱ 54) remained mother (his wife) and 5 children. Inheritance by law is that the first mother will automatically get half of the property and the other half inherited by heirs, the mother and her 5 children by the same share. Calcu - Efficiency
A certain device consumes 28 kW and delivers 14 kW. Find its efficiency. - Retail
At what price bought the retail 1 kg goods from wholesale if lost in the distribution is 4% of the weight of the goods, and retail still have a profit of 6.3%? Goods are sold at retail for 25 euro per kg.
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