A bike travelled a equal distance of 10 km at three different speeds a km/hr , 3a km/hr and 2a km/hr respectively. What is the average speed of the bike ?
1
\(\frac{6a}{11}\) km/hr
2
\(\frac{18a}{11}\) km/hr
3
\(\frac{3a}{11}\) km/hr
4
\(\frac{36a}{11}\) km/hr
5
\(\frac{8a}{11}\) km/hr