Inverse proportion - math word problems - page 12 of 21

Number of problems found: 406

Shadow
A meter pole perpendicular to the ground throws a shadow of 40 cm long. The house throws a shadow 6 meters long. What is the height of the house?
Bulbs and electricity
In the sports hall, 875 identical light bulbs light for 2 hours. How long do 100 such light bulbs consume the same amount of electricity?
Describe 6648
Images of three numbers are marked on the number line: 0, m, 3m-1. The marked pieces are the same length. a) express the ratio m:(3m-1) b) mark and describe the image of the number 1 on the number line.
Cylindrical 6636
A cylindrical container with a bottom diameter of 30 cm and a height of 20 cm is filled with water. We want to pour the water into another cylindrical container with a bottom diameter of 15 cm. What minimum height must the second container have for the wa
Part-timers 6436
Five part-timers ship all goods from the warehouse in 12 days. Calculate how long it would take to bring twice as many goods out of the warehouse to part-timers if their number increased by 140%.
Harvested 6269
Five workers harvested fruit in 150 hours. How many temporary workers have to work to harvest fruit in 250 hours?
Calculate 6268
Calculate the unknown velocity x if: 24 km/h. ... . .. .20min x km/h. ... . .. .12min
Calculate 6240
The ratio of the two natural numbers is 2:3. The smaller number in this pair is 12. Calculate the larger A number from this pair.
Produces 6170
The machine produces 2520 parts in 1 hour. How many will they make in 33 minutes?
The alley
The alley was planted with 490 trees 6 meters away. How many trees would be planted if the distance was 7.5 m?
Thunderstorm
The sound travels 1 km in about 3 seconds. How far is the storm if there is a time interval of 8 seconds between lightning and thunder?
Wood harvesting
The harvested wood is bundled from the forest to a sawmill. The driver makes the journey four times a day, and the work takes him eight days. How often would he have to go daily to finish the job two days earlier?
Two discounts
The MP4 player cost 960 CZK, and the price was twice gradually reduced in the ratio of 4:3:3/2. How much did the player cost after the second discount?
Motorcyclist 6145
The cyclist covered a certain distance in 6 hours and 15 minutes. How long will it take for a motorcyclist to travel five times more if he travels three times faster?
Minutes 6071
What is the angle of the big hand of the watch in 20 minutes?
Electric energy
There are 875 identical light bulbs in the sports hall lighting for 2 hours. How long does the same amount of electricity consume 100 such bulbs?
Consumption 6050
The car has an average gasoline consumption of 6.5 liters per 100 kilometers. How many kilometers will a full tank with a volume of 52 liters be enough at average consumption?
Capacity 5999
The tank is filled in 1 hour and 12 minutes with a pump with a capacity of 25 l/s. How long does filling the tank with a 20 l / s pump take?
Trapezoid - intersection of diagonals
In the ABCD trapezoid is AB = 8 cm long, trapezium height 6 cm, and distance of diagonals intersection from AB is 4 cm. Calculate the trapezoid area.
Rabbits 5980
Twenty rabbits have hay for 60 days. For how many days will five rabbits have them?

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