For the following questions answer them individually
The most economical section of a trapezoidal channel is one which has hydrulic mean depth equal to:
A short column 300 mm x 300 mm is reinforced with 4Â bars of 20 mm dia. (Fe-415 grade). If concrete is M-20Â grade, the max. axial load $$P_u (kN)$$ allowed on it is: