Average speed of a car between points A and B is 20 m/s, between B and C is 15 m/s, between C and D is 10 m/s. What is the average speed between A and D, if the time taken in the mentioned sections is 20s, 10s and 5s respectively?
A. 17.14 m/s
B. 15 m/s
C. 10 m/s
D. 45 m/s
Answer:A
Average speed of a car between points A and B is 20 m/s, between B and C is 15 m/s, between C and D is 10 m/s. What is the average speed between A and D, if the time taken in the mentioned sections is 20s, 10s and 5s respectively?
A. 17.14 m/s B. 15 m/s C. 10 m/s D. 45 m/s