Kinematics Question 350
Question: A bus travelling the first one third distance at a speed of 10 km/h, the next one third at 20 km/h and the last one-third at 60 km/h. The average speed of the bus it’s
Options:
A) 9 km/h
B) 16 km/h
C) 18 km/h
D) 48 km/h
Show Answer
Answer:
Correct Answer: C
Solution:
Average speed $ =\frac{s}{\frac{s/3}{10}+\frac{s/3}{20}+\frac{s/3}{60}}=\frac{s}{s/18}=18km/h $
