A box whose weight is $200\,\text{N}$ is pushed so that it travels at a constant speed along a ramp, rising through a height of $1.5\,\text{m}$. The ramp is inclined at an angle of $30^{\circ}$ to the ground. While the box is moving, the frictional force on it is $150\,\text{N}$. What is the work done by the person?
- A$150\,\text{J}$
- B$300\,\text{J}$
- C$450\,\text{J}$
- D$750\,\text{J}$