Themes, topics - math word problems - page 85 of 174
Number of problems found: 3474
- Lowest voltage
Three resistors with resistors R1 = 10 kΩ, R2 = 20 kΩ, R3 = 30 kΩ are connected in series and an external voltage U = 30 V is connected to them. On which resistor is the lowest voltage? - Kirchhoff's law
Two resistors with 100 Ω and 300 Ω resistors are connected in series. A current of 1.8 A passes through the first 100 Ω resistor. What current flows through the second resistor? - Simultaneous start 2
A tourist who travels at a speed of 8 km in 2 hours and a cyclist who travels at a speed of 10 km in half an hour set off from two places 24 km apart simultaneously. How long are they on the road before they meet? - Hospital death probability
Statistically, in a city of 100,000 inhabitants, 600 people die in one year. During the year, 2,000 people received hospital treatment, and 120 of them died there. Calculate the probability that a citizen who comes to the hospital for treatment will die t - Marathon training distance
Peter trains for a half marathon every day. He ran 1,000 m on the first day and increased the training length by 250 m daily. On a certain day, Peter ran 21 km in training. That day, he calculated the total distance he had run since the start of training. - Aircraft climbing
The average climb angle of the aircraft is 11° 20', and its average speed is 400 km/h. How long does it take to climb to a height of 3000 m? - Mains voltage
How much electric current flows through the appliance with a resistance of 40 kΩ, connected to the mains voltage (230 V)? - Resistor voltage
The current of 25 mA passes through the resistor with a resistance of 50 Ω. How much voltage do we measure on it? - Appliance resistance power
Calculate the resistance and power of the appliance through which a current of 20 mA flows at the mains voltage (230 V). - Resistor voltage How much voltage do we measure on a 400 Ω resistor when an electric current of 55 mA passes through it?
- Five combers
Five combers harvest 12 rows of strawberries in 4 hours. How many rows of strawberries will two combers harvest in 10 hours? - Copper Cu wire
Copper wire with a diameter of 1 mm and a weight of 350 g is wound on a spool. Calculate its length if the copper density is p = 8.9 g/cm cubic. - Cable car
The cable car will carry 1280 passengers in 40 minutes. How many people will be transported in 2.5 hours? - The field
Three tractors can plough a field in 6 hours. After 2 hours of working together, one tractor broke down. How long in total will it take to finish ploughing the field? - Trip average speed
Dad drove a business trip to a place 348 km away. He arrived at the scene after four hours. What was the average speed? - Started
A pedestrian leaves point A at a speed of v₁ = 5 km/h. After 3 hours, a cyclist sets off from the same place at a speed of v₂ = 20 km/h. At the same time as the cyclist, a car starts from point B, which is 50 km away. Calculate the distance and time at wh - Work together
Two bricklayers are plastering a wall. The first would plaster it in 8 hours, the second in 12 hours. If they work together, how many hours will they be done? - Birthday paradox
How large must a group of people be so that the probability of at least two people sharing a birthday is greater than 90%? - The tent
The tent has the shape of a regular square pyramid. The edge of the base is 3 m long, and the tent's height is 2 m. Calculate how much cover (without a floor) is used to make a tent. - Slow saving in banks
How long will it take to save € 9,000 by depositing € 200 at the beginning of each year at 2% interest?
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