Level:
Project ID:
1003025102
Accepted:
1
Clonable:
0
Easy:
0
A car travels the first quarter of its journey at an average speed of \( 50\, \mathrm{kph} \), the second quarter at an average speed of \( 90\, \mathrm{kph} \), the third quarter at an average speed of \( 130\, \mathrm{kph} \) and the remaining one quarter at an average speed of \( 80\, \mathrm{kph} \). What is the average speed of the car during the journey? Round the result to two decimal places.
\( 77{.}97\, \mathrm{km}/\mathrm{h} \)
\( 85{.}00\, \mathrm{km}/\mathrm{h} \)
\( 87{.}50\, \mathrm{km}/\mathrm{h} \)
\( 82{.}71\, \mathrm{km}/\mathrm{h} \)