# IMO Level 1- Mathematics Olympiad (SOF) Class 8: Questions 447 - 452 of 1042

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## Question 447

### Question

MCQ▾ABC is a right angled triangle with . AH is drawn perpendicular to BC where H lies on BC. If AB = 40 cm and AC = 60 cm, then BH = ________.

### Choices

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

a. | 40 | |

b. | Impossible to determine | |

c. | 30 | |

d. | 50 |

## Question 448

### Question

MCQ▾What is the ratio of the perimeter of the shaded region to the circumference of the circle?

### Choices

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

a. | ||

b. | ||

c. | ||

d. |

## Question 449

### Question

MCQ▾The radius of the cylinder whose lateral surface area is 610 and height 6 cm, is________.

### Choices

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

a. | 16 cm | |

b. | 11 cm | |

c. | 10 cm | |

d. | 12 cm |

## Question 450

### Question

MCQ▾The perimeter of a trapezoid is 60 cm and its non-parallel sides are each equal to 13 cm and its altitude is 12 cm. Its area is________.

### Choices

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

a. | ||

b. | ||

c. | ||

d. |

## Question 451

### Question

MCQ▾The ratio of radii of two cylinders is 1: 3 and heights are in the ratio 3: 5. The ratio of their volume is________.

### Choices

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

a. | 1: 14 | |

b. | 12: 3 | |

c. | 1: 12 | |

d. | 1: 15 |

## Question 452

### Question

MCQ▾A metal sheet 49 cm long, 7 cm broad and 1 cm thick is melted into a cube. The difference between surface areas of two solids is________.

### Choices

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

a. | ||

b. | ||

c. | ||

d. |