# NSTSE (National Science Talent Search Exam- Unified Council) Class 10: Questions 679 - 685 of 1484

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## Question number: 679

### Question

The angle of elevation of a cloud from a point 120 m above a lake is and the angle of depression of its image in lake is . The height of the cloud is ________.

### Choices

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

a. | 448.77 m | |

b. | 378.23 m | |

c. | 293.67 m | |

d. | 445.45 m |

## Question number: 680

### Question

The mean and median for a unimodal data are 67,67.3 respectively then the mode is

### Choices

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

a. | 69.8 | |

b. | 67.9 | |

c. | 65.6 | |

d. | 71.2 |

## Question number: 681

### Question

A book containing 90 pages is opened at random. The probability that a doublet page is found is

### Choices

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

a. |
| |

b. |
| |

c. |
| |

d. | All of the above |

## Question number: 682

### Question

The angle of depression of an object from a tower of height 90 m is . Then the distance of object from tower is ________.

### Choices

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

a. | 60 m | |

b. | 15 m | |

c. | 45 m | |

d. | 30 m |

## Question number: 683

### Question

1 - 10,11 - 20,21 - 30, are the classes. The lower limit of the class 21 - 30 is

### Choices

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

a. | 21 | |

b. | 30.5 | |

c. | 30 | |

d. | 20.5 |

## Question number: 684

» Mathematics » Triangles

### Question

LMNO is a trapezium in which . P & Q are the mid points of LO and MN. If PQ = 5 cm, ON = 8 cm, then LM = ________.

### Choices

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

a. | 9 cm | |

b. | 6.5 cm | |

c. | 8.5 cm | |

d. | 13 cm |

## Question number: 685

» Mathematics » Coordinate Geometry

### Question

The distance of the point from the origin is

### Choices

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

a. | units | |

b. | units | |

c. | units | |

d. | All of the above |