If x and y are in direct proportion, then (x – 1) and (y – 1) are also in direct proportion.

A car travels a distance of 225 km in 25 litres of petrol. How many litres of petrol will be required to cover a distance of 540 kilometres by this car?

Truck needs 54 litres of diesel for covering a distance of 297 km. The diesel required by the truck to cover a distance of 550 km is

In which of the following case, do the quantities vary directly with each other?

The variable x is inversely proportional to y. If x increases by p%, then by what percent will y decrease?

Kritika is following this recipe for bread. She realises her sister used most of sugar syrup for her breakfast. Kritika has only cup of syrup, so she decides to make a small size bread. How much of each ingredient shall she use?

Bread recipe

1 cup quick cooking oats

2 cups bread flour

cup sugar syrup

1 tablespoon cooking oil

cups water

3 tablespoon yeasts

1 teaspoon salt.

A bowler throws a cricket ball at a speed of 120 km/h. How long does this ball take to travel a distance of 20 metres to reach the batsman?

The following table shows the distance travelled by one of the new eco-friendly energy-efficient cars travelled on gas.

Which type of properties are indicated by the table? How much distance will be covered by the car in 8 litres of gas?

Ms. Anita has to drive from Jhareda to Ganwari. She measures a distance of 3.5 cm between these villages on the map. What is the actual distance between the villages if the map scale is 1 cm = 10 km?

Many schools have a recommended students-teacher ratio as 35:1. Next year, school expects an increase in enrolment by 280 students. How many new teachers will they have to appoint to maintain the students-teacher ratio?

The table shows the time for elevators take to travel various distances. Find which elevator is fastest and which is slowest.

How much distance will be travelled by elevators B and C separately in 140 secs? Who travelled more and by how much?