Time + expression of a variable from the formula - practice problems - page 15 of 16
Number of problems found: 316
- Cleaners
Milan would clean up the room for 2.5 hours, and Eric would take 10 hours. How long do they sweep the room together? - Bookshelve
Bookshelves with an original price of € 200 twice become cheaper. After the second discount of 15%, the price was € 149.60. Determine how much % becomes cheaper for the first time. - The car
The car traveled the distance between A and B for four hours. If we increase the average by 17 km/h, the car travels this distance an hour earlier. Determine the initial speed of the car and the distance between A and B. - Interst on savings
The bank offers 1.6% interest. How many euros do we have to insert at the beginning if we receive € 15 on the interest?
- The deposit
A deposit has been placed for one year at an annual rate of 4.5%. The amount rose to € 2,612.5 after one year. Find initial deposit. - Blueberries 2
Lenka and Martin collected eight liters of blueberries in two hours. How long will Lenka take to collect blueberries itself if we know that she collects all 2.5 hours less than Martin? - Car and cyclist
The cyclist started from town at a speed of 18 km/h. After 1 hour 30 min started the car from town and caught up with the cyclist in 50 minutes. How fast was a car? - Contract
Eight employees complete the contract for 65 hours. After 17 hours, three employees had to leave for another job. How many more hours will the job on the contract be fulfilled? - Calculation 3620
The mine foreman calculated that 2 pumps must be in operation for 17.5 hours to drain the tunnel. He wanted to speed up the emptying of the shaft and added 3 more identical pumps. How long will it take to empty the shaft? Please also show your calculation
- Master work
The master will complete the given task in 4 hours. How long will it take to master students entirely in three hours when they're done together? - Vacation 3568
Novak and Vyborn are leaving from a joint vacation. They agreed that when they were 100 km apart, they would send each other SMS. Novices drive at a speed of 60 km/h, Advanced 90 km/h. They left at 2:00 PM (14:00). What time do they text each other? - Acceleration 3503
What speed was the car moving until the driver started braking when it moved with a constant acceleration a = -1.2m/s² during braking until it stopped, traveling a distance of 135m? - Twenty-seven 3476
Twenty-seven workers did the work in 12 days. In how many days would nine workers do the same job? - Calculated 3465
The master calculated that six looms would weave the ordered fabric in 15 hours. One condition appeared. How long before the ordered substance matches the remaining states?
- Machines 3358
The first machine was made for hours to watch pieces. The more powerful machine produced 32 more watches in the same period. How many watches would both machines produce together in 3 hours? - Painters
Five painters painted the fence for eight days. How many days over will it take to work if they paint the fence with only four decorators? - Harvesters
The first harvester reaps the grain from the land for 24 hours, and the second harvester for 16 hours. How many hours will it take to harvest by two harvesters, but the second harvester started working four hours later than the first? - Speedboat 3189
At 12:15, a train speeding 55km / h left the station. Twelve minutes later, an 80km / h speedboat set off behind the train. What time does the express train catch up? How far from the station? - Bus lines
Bus connections are started from the bus stop on its regular circuit: No. 27 bus every 27 minutes and No.18 every half hour. What time start these two bus lines run if the bus stop meets at 10:15 am.?
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