# IMO Level 1- Mathematics Olympiad (SOF) Class 8: Questions 427 - 434 of 1042

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## Question 427

## Question 428

## Question 429

## Question 430

## Question 431

### Question

MCQ▾The perimeter of a triangle is and two of its sides are and. Find the third side of the triangle.

### Choices

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

a. | ||

b. | ||

c. | ||

d. |

## Question 432

### Question

MCQ▾A hoop is resting vertically at staircase as shown in the diagram. AB = 12 cm and BC = 6 cm. The radius of the hoop is________.

### Choices

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

a. | 11 cm | |

b. | 10 cm | |

c. | 12 cm | |

d. | 15 cm |

## Question 433

### Question

MCQ▾Find the surface area of a cylinder with diameter of base 5 cm and height 30 cm.

### Choices

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

a. | 510 | |

b. | 610 | |

c. | 505 | |

d. | 511 |

## Question 434

### Question

MCQ▾Two rectangles ABCD and DBEF are as shown in the figure. The area of rectangle DBEF in square units is________.

### Choices

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

a. | 120 | |

b. | 140 | |

c. | 90 | |

d. | 160 |