Secondary School (English Medium) (5 to 8) कक्षा ८ - CBSE Question Bank Solutions

Length of a side of a square and its area vary directly with each other.

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

When two quantities are related in such a manner that, if one increases, the other also increases, then they always vary directly.

The number of workers and the time to complete a job is a case of direct proportion.

For fixed time period and rate of interest, the simple interest is directly proportional to the principal.

The area of cultivated land and the crop harvested is a case of direct proportion.

Write whether the following statement vary directly, vary inversely with each other, or neither of the two.

The distance travelled by CNG bus and the amount of CNG used.

Write whether the following statement vary directly, vary inversely with each other, or neither of the two.

Income tax and the income.

Write whether the following statement vary directly, vary inversely with each other, or neither of the two.

Distance travelled by an auto-rickshaw and time taken.

Write whether the following statement vary directly, vary inversely with each other, or neither of the two.

Number of students in a hostel and consumption of food.

Write whether the following statement vary directly, vary inversely with each other, or neither of the two.

Area of the walls of a room and the cost of white washing the walls.

Write whether the following statement vary directly, vary inversely with each other, or neither of the two.

The number of people working and the quantity of work.

Write whether the following statement vary directly, vary inversely with each other, or neither of the two.

Simple interest on a given sum and the rate of interest.

Write whether the following statement vary directly, vary inversely with each other, or neither of the two.

The quantity of rice and its cost.

Write whether the following statement vary directly, vary inversely with each other, or neither of the two.

Area of land and its cost.

Write whether the following statement vary directly, vary inversely with each other, or neither of the two.

Sales Tax and the amount of the bill.

The variable x varies directly as y and x = 80 when y is 160. What is y when x is 64?

l varies directly as m and l is equal to 5, when `m = 2/3`. Find l when `m = 16/3`.

In a camp, there is enough flour for 300 persons for 42 days. How long will the flour last if 20 more persons join the camp?

A car covers a distance in 40 minutes with an average speed of 60 km/h. What should be the average speed to cover the same distance in 25 minutes?