[Solved] 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?

Civil Engineering
Engineering Graphics
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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