Question

if four boats all traveled 20 feet, which of the following boats had the greatest speed? boat b - 12 seconds boat a - 9 seconds boat c - 15 seconds boat d - 10 seconds

Explanation:

Step1: Recall speed formula

Speed $v=\frac{d}{t}$, where $d$ is distance and $t$ is time. Here $d = 20$ feet for all boats.

Step2: Calculate speed for each boat

For Boat A: $v_A=\frac{20}{9}\approx2.22$ feet - per - second.
For Boat B: $v_B=\frac{20}{12}=\frac{5}{3}\approx1.67$ feet - per - second.
For Boat C: $v_C=\frac{20}{15}=\frac{4}{3}\approx1.33$ feet - per - second.
For Boat D: $v_D=\frac{20}{10} = 2$ feet - per - second.

Step3: Compare speeds

Since $2.22>2 > 1.67>1.33$, Boat A has the greatest speed.

Answer:

Boat A