A person travels from P to Q at a speed of 40 kmph and returns by increasing his speed by 50%. What is the average speed for both the trips?
সমাধান
সঠিক উত্তর: Option C
Speed while going = 40 km/hr Speed while returning = 150% of 40 = 60 km/hr
Average speed = 2xy/(x+y)
= 2*40*60/(40+60)
= 4800/100 = 48 kmph
