Anoop travels first 1/3 of the total distance at the speed of 10 km/hr. and the next 1/3 distance at the speed of 20 km/hr. and the last 1/3 distance at the speed of 60 km/hr. The average speed of Anoop is-
A. 18
B. 21
C. 14
D. 16
Answer:A
Anoop travels first 1/3 of the total distance at the speed of 10 km/hr. and the next 1/3 distance at the speed of 20 km/hr. and the last 1/3 distance at the speed of 60 km/hr. The average speed of Anoop is-
A. 18 B. 21 C. 14 D. 16