Obliczamy kolejno:

• pomiar
  ${\text{t}}_1=3\text{min}2\text{s}=3\cdot 60\text{s}+2\text{s}=182\text{s}$  
  ${\text{v}}_1=\frac{\text{s}}{{\text{t}}_1}=\frac{500\text{m}}{182\text{s}}\approx 2,75\frac{\text{m}}{\text{s}}$  
  ${\text{v}}_1=\frac{2,75\cdot \frac{1}{1000}\text{km}}{\frac{1}{3600}\text{h}}=9,9\frac{\text{km}}{\text{h}}$  
• pomiar:
  ${\text{t}}_2=2\text{min}53\text{s}=2\cdot 60\text{s}+53\text{s}=173\text{s}$  
  ${\text{v}}_2=\frac{\text{s}}{{\text{t}}_2}=\frac{500\text{m}}{173\text{s}}\approx 2,89\frac{\text{m}}{\text{s}}$  
  ${\text{v}}_2=\frac{2,89\cdot \frac{1}{1000}\text{km}}{\frac{1}{3600}\text{h}}=10,4\frac{\text{km}}{\text{h}}$  
• pomiar:
  ${\text{t}}_3=3\text{min}17\text{s}=3\cdot 60\text{s}+17\text{s}=197\text{s}$  
  ${\text{v}}_3=\frac{\text{s}}{{\text{t}}_3}=\frac{500\text{m}}{197\text{s}}\approx 2,54\frac{\text{m}}{\text{s}}$  
  ${\text{v}}_3=\frac{2,54\cdot \frac{1}{1000}\text{km}}{\frac{1}{3600}\text{h}}=9,1\frac{\text{km}}{\text{h}}$  
• pomiar:
  ${\text{t}}_4=3\text{min}1\text{s}=3\cdot 60\text{s}+1\text{s}=181\text{s}$   
  ${\text{v}}_4=\frac{\text{s}}{{\text{t}}_4}=\frac{500\text{m}}{181\text{s}}\approx 2,76\frac{\text{m}}{\text{s}}$   
  `"v"_4=(2,76*1/1000\ "km")/(1/3600\ "h")=9,9\ "km"/"h" 

	Czas	Czas	Prędkość	Prędkość
Nr pomiaru	min:s	s	m/s	km/h
1.	3:02	182	2,75	9,9
2.	2:53	173	2,89	10,4
3.	3:17	197	2,54	9,1
4.	3:01	181	2,76	9,9

Teraz możemy obliczyć średnią pomiarów:

$\text{v}=\frac{{\text{v}}_1+{\text{v}}_2+{\text{v}}_3+{\text{v}}_4}{4}=\frac{2,75\frac{\text{m}}{\text{s}}+2,89\frac{\text{m}}{\text{s}}+2,54\frac{\text{m}}{\text{s}}+2,76\frac{\text{m}}{\text{s}}}{4}=\frac{10,94\frac{\text{m}}{\text{s}}}{4}=2,735\frac{\text{m}}{\text{s}}$  

$\text{v}=\frac{{\text{v}}_1+{\text{v}}_2+{\text{v}}_3+{\text{v}}_4}{4}=\frac{9,9\frac{\text{km}}{\text{h}}+10,4\frac{\text{km}}{\text{h}}+9,1\frac{\text{km}}{\text{h}}+9,9\frac{\text{km}}{\text{h}}}{4}=\frac{29,4\frac{\text{km}}{\text{h}}}{4}=7,35\frac{\text{km}}{\text{h}}$