# IMO Level 1- Mathematics Olympiad (SOF) Class 9: Questions 397 - 402 of 931

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## Question 397

### Question

MCQ▾In the adjoining figure, Line p and q are transversals, then ST = ________

### Choices

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

a. | 10 units | |

b. | 15 units | |

c. | 12 units | |

d. | 14 units |

## Question 398

### Question

MCQ▾In the medians PS, QT and RU pass through O. if, and then OS is ________

### Choices

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

a. | 2.5 | |

b. | 2.6 | |

c. | 2.3 | |

d. | 2.9 |

## Question 399

### Question

MCQ▾What change in percent is made in the area of a rectangle by decreasing its length and increasing its breadth by ?

### Choices

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

a. | ||

b. | ||

c. | ||

d. |

## Question 400

### Question

MCQ▾The heights of two cones are in the ratio of 3: 8 and their radius in the ratio 5: 3. Then the ratio of their volumes is ________

### Choices

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

a. | ||

b. | ||

c. | ||

d. |

## Question 401

### Question

MCQ▾PQRS is a cyclic Quadrilateral whose diagonals intersect at a point E. If, , , then =________

### Choices

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

a. | ||

b. | ||

c. | ||

d. |

## Question 402

### Question

MCQ▾The area of rhombus is and one of its diagonals is 8 cm. its perimeter is ________

### Choices

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

a. | ||

b. | ||

c. | ||

d. |