If two quantities and p and q vary inversely with each other, then
A. remains constant.

B. p + q remains constant.

C. p × q remains constant.

D. p - q remains constant.

Assuming land to be uniformly fertile, the area of land and the yield on it vary

Which quantities in the previous question vary inversely with each other?

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

By travelling at a speed of 48 kilometres per hour, a car can finish a certain journey in 10 hours. TO cover the same distance in 8 hours, the speed of the car should be

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

A water tank casts a shadow 21 m long. A tree of height 9.5 m casts a shadow 8 m long at the same time. The lengths of the shadows are directly proportional to their heights. Find the height of the tank.

There are 20 grams of protein in 75 grams of sauted fish. How many grams of protein is in 225 gm of that fish?

The students of Anju’s class sold posters to raise money. Anju wanted to create a ratio for finding the amount of money her class would make for different numbers of posters sold. She knew they could raise Rs. 250 for every 60 posters sold.

(a) How much money would Anju’s class make for selling 102 posters?

(b) Could Anju’s class raise exactly Rs. 2,000? If so, how many posters would they need to sell? If not. Why?

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?