Question

If the first one-third of a journey is travelled at 20 km h-1, next one-third at 40 km h-1 and the last one-third a
60 km h-1, then the average speed for the whole journey will be (Single Choice Question)
a 32.7 km h-1
b
35 km h-1
с
40 km h-1
d
45 km h-1​

Answer 1

Answer: A) 32.7

Explanation:avg speed = 3abc/( ab + bc+ ca)

= 3* 20* 40* 60/

(20*40+40*60+60*20