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PQRS is a desk of dimensions 2m x 0.8 which is inclined at 30o to…

PQRS is a desk of dimensions 2m x 0.8 which is inclined at 30^o to the horizontal. Find the inclination of the diagonal PR to the horizontal

A.
30^o 35′
B.
30^o 32′
C.
15^o 36′
D.
10^o
E.
10^o 42′

Correct Answer: Option E

Explanation

tan(theta) = (frac{0.8}{2}) = (0.4)
(theta) = tan^-1(0.4)
From the diagram, the inclination of the diagonal PR to the horizontal is 10^o 42′