GRE Question of the Day

Answer

1. 23.5 feet per second

Use the following relationships to calculate this conversion:

\(1\mathrm{~hour}=3,600\mathrm{~seconds}\) and \(1\mathrm{~mile}=5,280\mathrm{~feet}\)

We find 3,600 by taking 60 minutes per hour times 60 seconds per minute.

\(16\frac{\mathrm{mi}}{\mathrm{hr}}=\left(16\frac{\mathrm{mi}}{\mathrm{hr}}\right)\left(\frac{1\mathrm{~hr}}{3,600\mathrm{~s}}\right)\left(\frac{5,280\mathrm{~ft}}{\mathrm{~mi}}\right)\approx \frac{23.5\mathrm{~ft}}{\mathrm{s}}\)