SSC JE Civil Engineering 23-Sep-2019 Shift 2 Solved Paper

The inclined length of the crank = D/ Sin30° = 2D
Length covered by crank = D/tan30° =1.73D
Formulae for calculating extra length required for only one bend
= D/sin30° – D/tan30°
= 2D – 1.73D = 0.267D