Find average speed if a man travels at speed of 20km/hr up and 26km/hr dawn at an altitude of 240m. Choose one:
A) 25.8
B) 26.8
C) 22.6
D) 28.8
E) 29.8
avg speed=2*x*y/(x+y)   =2*20*26/(20+26)=22.6   ANSWER:22.6
<result>C</result>
Find average speed if a man travels at speed of 20km/hr up and 26km/hr dawn at an altitude of 240m.