A person travelled from his house to office at 40km/hr and office to house at 60km/hr. Then find the average speed?
Choose the correct choice from the following:
A) 30km/hr	B) 40km/hr	C) 48km/hr	D) 50km/hr	E) 62km/hr
Average speed = (2*40*60)/(40+60)= 
<gadget id="calculator">(2*40*60)/(40+60)</gadget>
<output>48</output>
48km/hr   Answer is 48km/hr
<result>C</result>
A person travelled from his house to office at 40km/hr and office to house at 60km/hr. Then find the average speed?