Use the Fact That the Diameter of the Largest Particle $\frac { 1 } { 5 }$

Multiple Choice

Use the fact that the diameter of the largest particle that can be moved by a stream varies approximately directly as the square of the velocity of the stream. ​
A stream with a velocity of $\frac { 1 } { 5 }$ mile per hour can move coarse sand particles about 0.07 inch in diameter.Approximate the velocity required to carry particles 0.2 inch in diameter.(Round your answer to two decimal places. )
​

A) About 0.84 mi/h
B) About 0.19 mi/h
C) About -0.16 mi/h
D) About 0.49 mi/h
E) About 0.34 mi/h