Proportion

The number of kilograms of water in a person’s body varies directly as the person’s mass.  A person with a mass of 90 kg contains 60 kg of water.  How many kilograms of water are in a person whose mass is 75 kg?

The number of hours to paint a house varies inversely with the number of painters working. A 2400-square foot house can be painted in 27 hours by 6 painters. How many painters would need to work in order to paint the house in 18 hours?

Maita earns 450 pesos in selling sampaguita garlands on 4 Sundays. How many Sundays will it take her to earn 1,350 pesos?

In a certain school, there are 1, 530 students in all. How many girls if the ratio of boys to girls is 5:12?

In a class of 40, the ratio of boys to girls is 3:5. How many are girls? How many are boys?

The earnings of a father and his daughter are 9:7. If they both receive Php16000, what is the share of each?

In a class of 40, the ratio of boys to girls is 3:5. How many are girls? How many are boys?

It takes 14 hours for a faucet with a flow of 18 liters per minute to fill a reservoir with water. How long will it take if its flow is reduced to 7 liters per minute?

If 32 men can reap a field in 15 days, in how many days can 20 men reap the same field?

The ratio of the three sides of a triangle is 1:2:3. what are the measurements of each side if the perimeter of the triangle is 120cm?