Terminal Velocity: Solving for D

[student34]

Homework Statement

A man 50.0kg has a terminal velocity of 42m/s. What value of D is required to make this possible?

Homework Equations

V(terminal velocity) = (mg/D)^1/2

The Attempt at a Solution

D = (50kg*9.8m/s^2)/(42m/s)^2) = 0.28kg/m

The book's answer is 44kg/m. Is the book wrong or am I wrong?

 

[NascentOxygen]

0.28 kg/m satisfies that equation.

 

[student34]

0.28 kg/m satisfies that equation.

Thanks, I needed some reinforcement.