A car covers half of its journey with a speed of 10 ms-1 and the other half by 20 ms-1. The average speed of car during the total journey is –
A. 70 ms-1
B. 15 ms-1
C. 13.33 ms-1
D. 7.5 ms-1
Answer:C
A car covers half of its journey with a speed of 10 ms-1 and the other half by 20 ms-1. The average speed of car during the total journey is –
A. 70 ms-1 B. 15 ms-1 C. 13.33 ms-1 D. 7.5 ms-1