Chapter 13 – Direct and Inverse Proportions
106. 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.
05
Aug
106. 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. 4. The number of teeth and the age of a [...]
105. Kusum always forgets how to convert miles to kilometres and back again. However she remembers that her car’s speedometer shows both miles and kilometres. She knows that travelling 50 miles per hour is same as travelling 80 kilometres per hour. To cover a distance of 200 km, how many miles Kusum would have to go?
05
Aug
105. Kusum always forgets how to convert miles to kilometres and back again. However she remembers that her car’s speedometer shows both miles and kilometres. She knows that travelling 50 miles per hour is same as travelling 80 kilometres per hour. To cover a distance of 200 km, how many miles Kusum would have to [...]
104. 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?
05
Aug
104. 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? 104. Many schools have a recommended students-teacher ratio as 35:1. Next year school expects an increase in enrolment by 280 [...]
103. Kritika is following this recipe for bread. She realises her sister used most of sugar syrup for her breakfast. Kritika has only 1/6 cup of syrup, so she decides to make a small size of bread. How much of each ingredient shall she use?
05
Aug
103. Kritika is following this recipe for bread. She realises her sister used most of sugar syrup for her breakfast. Kritika has only 1/6 cup of syrup, so she decides to make a small size of bread. How much of each ingredient shall she use? 103. Kritika is following this recipe for bread. She realises [...]
102. 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?
05
Aug
102. 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? 4. The number of teeth and the age of a person vary August [...]
101. Here is a key board of a harmonium: (a) Find the ratio of white keys to black keys on the keyboard.
05
Aug
101. Here is a key board of a harmonium: (a) Find the ratio of white keys to black keys on the keyboard. 101. Here is a key board of a harmonium: (a) Find the ratio of white keys to black keys on the keyboard. August 5, 2021 Category: Chapter 13 - Direct and Inverse Proportions [...]
100. The variable x is inversely proportional to y. If x increases by p%, then by what per cent will y decrease?
05
Aug
100. The variable x is inversely proportional to y. If x increases by p%, then by what per cent will y decrease? 100. The variable x is inversely proportional to y. If x increases by p% then by what per cent will y decrease? August 5, 2021 Category: Chapter 13 - Direct and Inverse Proportions [...]
99. 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?
05
Aug
99. 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? 99. 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 [...]
98. Pattern B consists of four tiles like pattern A. Write a proportion involving red dots and blue dots in pattern A and B. Are they in direct proportion? If yes, write the constant of proportion.
05
Aug
98. Pattern B consists of four tiles like pattern A. Write a proportion involving red dots and blue dots in pattern A and B. Are they in direct proportion? If yes, write the constant of proportion. 98. Pattern B consists of four tiles like pattern A. Write a proportion involving red dots and blue dots [...]
97. A recipe for a particular type of muffins requires 1 cup of milk and 1.5 cups of chocolates. Riya has 7.5 cups of chocolates. If she is using the recipe as a guide, how many cups of milk will she need to prepare muffins?
05
Aug
97. A recipe for a particular type of muffins requires 1 cup of milk and 1.5 cups of chocolates. Riya has 7.5 cups of chocolates. If she is using the recipe as a guide, how many cups of milk will she need to prepare muffins? 97. A recipe for a particular type of muffins requires [...]