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- The length of line placed in profile pla...

Q. |
## The length of line placed in profile plane and making an angle of 155 degrees with the horizontal is 3 cm from top view. What is the actual length? |

A. | 3.31 cm |

B. | 7.09 cm |

C. | 1.26 cm |

D. | 2.7 cm |

Answer» A. 3.31 cm | |

Explanation: the line is making 155 degrees is equal to the line making 25 degrees as 180- 155 =25. the length of line from top view will be cosine of actual length. l * cosine (25) =3 cm, l= 3/ cosine (25)= 3.31 cm. |

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Engineering Graphics

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