Question

A line of length 15 cm is on vertical plane makes an angle of 50 degrees with horizontal plane. What is the length of line in side view?

(a) 0 cm

(b) 11.49 cm

(c) 9.6 cm

(d) 15 cm

I had been asked this question in an interview for internship.

The query is from Projection of Line Contained by Plane in portion Projection of Lines of Engineering Drawing

Answer 1

Right option is (b) 11.49 cm

The best I can explain: Given the line of 15 cm length is present on the vertical plane and making an angle of 50 degrees with horizontal plane so side view’s length will be 15 x sin (50) = 11.49 cm and front view will be 15 x sin (90-50).