Question

a road has a steady gradient of 1 in 10. what angle does the road make with the horizontal to the nearest degrees

Answer 1

tan θ = 1 / 10 = 0.1

θ = arctan ( 0.1 ) = tan⁻¹( 0.1 )

θ = 5.7105931375°

θ = 6° to the nearest degrees