Shikha travels by her own vehicle and covers 20% of her journey with a speed of 10 km/hr, 50% of her journey with a speed of 25 km/hr and remaining 30% of her journey with a speed of 15 km/hr. What will be the average speed of Shikha for the whole journey?
1
28 km/hr
2
16.66 km/hr
3
25 km/hr
4
25.55 km/hr