A boy walks 800m in 20 minutes Calculate his av... - WAEC Mathematics 2004 Question
A boy walks 800m in 20 minutes. Calculate his average speed in km per hour
A
2.4
B
4
C
16
D
24
correct option: a
\(Average \hspace{1mm}speed = \frac{Distance}{Time\hspace{1mm} taken}\
Distance = 800m = \frac{800}{1000}km = 0.8km\
Time\hspace{1mm}taken = 20\hspace{1mm}minutes = \frac{20}{60}hr=\frac{1}{3}hr\Average \hspace{1mm} speed = \left(0.8\div \frac{1}{3}\right)km/hr = (0.8\times3)km/hr\=2.4km/hr\)
Distance = 800m = \frac{800}{1000}km = 0.8km\
Time\hspace{1mm}taken = 20\hspace{1mm}minutes = \frac{20}{60}hr=\frac{1}{3}hr\Average \hspace{1mm} speed = \left(0.8\div \frac{1}{3}\right)km/hr = (0.8\times3)km/hr\=2.4km/hr\)
Please share this, thanks:
Add your answer
No responses