Question

A line of length X cm lied on horizontal plane turned 60 degrees with respect to horizontal plane by keeping one of its ends fixed and attained length of Y cm top view. Which of the following statement is true?

(a) X =Y

(b) X=2 * Y

(c) X= ½ * Y

(d) X >Y

I have been asked this question by my college professor while I was bunking the class.

I'd like to ask this question from Projection of Line Inclined to both the Planes topic in section Projection of Lines of Engineering Drawing

Answer 1

Correct answer is (c) X= ½ * Y

Best explanation: As cos (60) =0.5. The X would equal to ½ *Y. The relation would be like this. X=Y happens if we watch from front view. And X will not be greater than Y as X is made to turn either it would stay same or become less than it.