Equations practice problems - page 218 of 251
Number of problems found: 5001
- Cork and swimming
If a person weighs 80 kg, how many kilograms of cork must take a swimming belt to float on water? The density of the human body is 1050 kg/m3, and the cork is 300 kg/m³. (Instructions: Let the human body and cork on a mixture with a density of - Worker payment
Three part-timers received a total of 2,800 Euros for their work. They divided them according to their performances so that the first got 2/5 less than the second and the third got 50 Euros more than the first. How many crowns did the third one get? - Car loads
The construction material was taken away by three different large cars. The weight of the load on the second was 20% more than on the first. The weight on the third was 20% more than on the second. They loaded a total of 18.2 tons. How many tons were on e - Saving
The boy has saved 50 coins, € 5, and € 2. He saved € 190. How many were € 5, and how many were € 2? - Pumps A and B
Pump A fills the tank for 12 minutes, and pump B for 24 minutes. How long will it take to fill the tank if he is only three minutes work A and then both pumps A and B? - Tank filling
The water tank is filled with the first inflow in 1 hour 20 minutes, the second in 60 minutes. How many minutes will the tank be half full with both inlets if the other inlet is opened 12 minutes later? - On the farm
On the farm, 70 heads of cattle were housed with a food supply for 180 days. After 60 days, ten heads of cattle were sold, and for the next 30 days, they sold ten more. How many days is a sufficient supply of feed for the remaining cattle? - The dam
The water reservoir is filled with the first tributary for 25 hours and the second tributary for 35 hours. Sometimes, both inlets open, then a second tributary closed, and they filled the tank in four hours. What time does water flow from both tributaries - Bus and Milan
A bus left the village at a speed of 60 km/h. One kilometre later, Milo set off on a motorcycle with his grandmother to catch the bus. When they found the bus had already left, they tried to catch up. At the next stop, 3 km away, they caught up with the b - Grass garden
Mr. Grass would mow the garden for 5 hours, and his son Michael could do it for 7 hours. They agreed to wake up at 5 AM and begin to mow together. Ms. Grass needs to drive into town at 8:30. Michael says that at that time, they're done with work. Is he ri - Commuters - school
A total of 750 pupils attend the school. 20% of students are commuters. 18% of pupils commute in the first grade and 23% in the second grade. How many first graders does the school have? - Original price
What was the price of the washing machine if, after an increase of 35%, it cost 12690 €? - Joint-stock company
In a joint-stock company workers were employed, divided into two categories according to the degree of automation of the production processes. In the workshop with a low degree of automation of production processes worked 25% of all workers, and in this d - Savings calculation
How many euros does Karol save if 7% of his savings is 70 euros? - AP - basics
Determine the first member and differentiate the following sequence: a3-a5=24 a4-2a5=61 - Coffee
A coffee merchant has Robusta and Arabica coffee beans. 1 kg of Robusta costs 450 CZK, and 1 kg of Arabica is 300 CZK more expensive. Calculate how many kilograms of Robusta and Arabica will need to produce 30 kg of the mixture so that the mixture costs 4 - Euros
Peter, Jane, and Thomas have €550 together. Thomas has 20 euros more than Jane, and Peter has €150 less than Thomas. Determine how much each of them has. - Percentage calculation
Determine x if 98% of x equals 196. - Simple equation
Solve a simple equation: 2-3x: 5 = 1 - Triangle - is RT?
The triangle has a circumference of 90 cm. Side b is 1 cm longer than side c, and side c is 31 cm longer than side a. Calculate the length of the sides and determine whether a triangle is a right triangle.
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