Find avrg speed if a man travels at speed of 32km/hr up and 48km/hr dawn at an altitude of 230m. Choose the correct choice
A) 25.8 B) 26.8 C) 38.4 D) 34.4 E) 29.8
avg speed=2*x*y/(x+y)   =2*32*48(32+48)=38.4   ANSWER:38.4
<result>C</result>
Find avrg speed if a man travels at speed of 32km/hr up and 48km/hr dawn at an altitude of 230m.