Question

A man drives 150 km from town A to town B in 3 hours 20 minutes and returns to town A from town B in 4 hours 10 minutes. Find his average speed for the whole journey. ​

Answer 1

Answer:

40km/h

Step-by-step explanation:

Average speed =

$\frac{total \: distnce}{total \: time}$

total distance = 150+150=300km

total time = 3hrs20min + 4hrs10min= 7hrs 30min

$= 7 \times \frac{1}{2} hrs$

$= \frac{15}{2}$

Average speed =

$\frac{300 \times 2}{15}$

= 40km/h