# Direct and Inverse Proportions (IMO- Mathematics Olympiad Class 8): Questions 28 - 34 of 62

Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to **1029** questions. Access all new questions we will add tracking exam-pattern and syllabus changes. View Sample Explanation or View Features.

Rs. 450.00 or

## Question number: 28

» Direct and Inverse Proportions

### Question

A bag contains 25 paise, 10 paise and 5 paise coins in the ratio 1: 4: 5. If their total value is Rs. 90, the number of 10 paise coins is ________.

### Choices

Choice (4) | Response | |
---|---|---|

a. | 400 | |

b. | 500 | |

c. | 800 | |

d. | 600 |

## Question number: 29

» Direct and Inverse Proportions

### Question

If A: B = 1: 4 and B: C = 3: 5, then C: A is equal to, ________.

### Choices

Choice (4) | Response | |
---|---|---|

a. | 24: 15 | |

b. | 25: 14 | |

c. | 3: 20 | |

d. | 20: 3 |

## Question number: 30

» Direct and Inverse Proportions

### Question

can do a piece of work in 70 days. He works at it for 7 days and then alone finishes the work in 40 days. The two together could have completed the work in ________.

### Choices

Choice (4) | Response | |
---|---|---|

a. | 30 days | |

b. | 23.8 days | |

c. | 20.5 days | |

d. | 23 days |

## Question number: 31

» Direct and Inverse Proportions

### Question

Two pipes A and B can fill a tank in 12 and 24 minutes respectively. If both the pipes are used together, then how long will it take to fill the tank?

### Choices

Choice (4) | Response | |
---|---|---|

a. | 2 minutes | |

b. | 6 minutes | |

c. | 5 minutes | |

d. | 8 minutes |

## Question number: 32

» Direct and Inverse Proportions

### Question

An agent receives a commission of Rs. 50.00 on sales of Rs. 3500.00. The commission he get on sales of Rs. 300.00 is________.

### Choices

Choice (4) | Response | |
---|---|---|

a. | Rs 4.00 | |

b. | Rs 3.50 | |

c. | Rs 4.28 | |

d. | Rs 2.87 |

## Question number: 33

» Direct and Inverse Proportions

### Question

If A: B = 2: 3 and B: C = 3: 5, then C: A is equal to, ________.

### Choices

Choice (4) | Response | |
---|---|---|

a. | 2: 3 | |

b. | 4: 5 | |

c. | 5: 2 | |

d. | 5: 4 |

## Question number: 34

» Direct and Inverse Proportions

### Question

0.9 of a number equals 0.03 of another number. The ratio of the number is________.

### Choices

Choice (4) | Response | |
---|---|---|

a. | 10: 3 | |

b. | 1: 30 | |

c. | 3: 10 | |

d. | 3: 20 |