A man weighing 88 kgf descends to the ground from an aeroplane with the help of a parachute against the resistance of air. The velocity with which the parachute comes down is 19 m/s. Find the diameter of the parachute. Take CD = 0.5 and density of air ρ = 1.2 kg/m³

A man weighing 84 kgf descends to the ground from an aeroplane with the help of a parachute against the resistance of air. The velocity with which the parachute comes down is 21 m/s. Find the diameter of the parachute. Take CD = 0.5 and density of air ρ = 1.2 kg/m³