Direct proportionality - math word problems - page 37 of 38
Number of problems found: 741
- Washer
A washing machine drum spins at 64 RPM. The motor pulley has a diameter of 6 cm. What must be the diameter of the drum pulley if the motor runs at 367 RPM? - Blood
In the human body, the blood is about 7.3% body weight. How many kilograms of blood are in the human body with a weight of 91 kg? - Chocolate
Anthony bought 9 same chocolates for 18 Eur. How many euros will he pay for 19 chocolates? - Cow
145 cow consumes 8990 kg hay per day. How many kg of hay was consumed by one cow in one day? - Expression
If it is true that (p + 9 m)/(m) = -19, then the value of the expression (13 p)/(11 m) is: - Fixed expenses 2013
Since 2013, the Slovak government has had plans to tax more small one-person businesses. Instead of fixed expenses, 40% will be fixed expenses 40% of gross income up to 420 Eur. Calculate the percentage of fixed expenses that will be paid in 2013 from gro - Sea on the Moon
Assume that the Moon has a sea with the same composition as Earth's (it has the same saltwater density). Calculate the boat's dive floating in the sea on the Moon when on Earth, it has dived 3.9 m. Consider that the Moon has 6.5-times smaller gravitationa - Equator
Suppose a tourist walked all the way around the Earth along the equator. How many more metres would the tourist's hat travel than the soles of their shoes? The radius of the Earth is 6378 km, and the tourist's height is 1.7 m. - Cyclist
A cyclist rides 7 km uphill in 46.9 minutes and the same distance downhill in 15.4 minutes, applying the same force to the pedals throughout. How long would it take to cycle the same 7 km on flat ground? - Expansion
If one side of a rectangle is multiplied by 2 and the other side by 4, by what percentage does the area increase? - Function
For linear function f(x) = ax + b is f(19)=141; f(20)=168. Calculate m, if f(m) = 2018. - Potatoes
Potatoes contain 77.6% starch. How many potatoes need to obtain 71.8 kg of starch? - Pipes
A water pipe has a cross-section of 1903 cm². In one hour, 859 m³ of water flows through it. How much water flows through a pipe with a cross-section of 300 cm² in 11 hours, if the water flows at the same speed? - Gear wheels
Two meshing gear wheels have tooth counts of z₁ = 43 and z₂ = 154. Calculate the speed of the first wheel if the second wheel rotates at 766 revolutions per minute. - Car range
Kia has an average diesel consumption of 5.2 liters per 100 kilometers. What is the range of the car for 138 euros if fuel costs 1.3 EUR/liter, if the tank has a volume of 64 liters? - Fuel consumption
Kia car has an average nafty consumption of 6.4 liters per 100 kilometers. What is the car range for a full tank of volume 71 liters? - Sphere growth
How many times does a volume of the sphere rise if priemer rises 10×? - Acid
A barrel contains 79 litres of 60% acid. What percentage of acid remains when 4 litres are removed and replaced with the same amount of water? - Ratio
5 numbers are in the ratio 1:2:4:5:5. Their sum is 29172. What are the numbers? - Election mathematics
In elections, 8 political parties received the following shares of votes: strana A ; 56 % strana B ; 11.9 % strana C ; 11.7 % strana D ; 8.8 % strana E ; 6.3 % strana F ; 5.1 % strana G ; 0.2 % Calculate what share each party would obtain in parliament if
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