Question

In still water a boat reached a point at 12 km/hr and return with a speed of 15km/hr then what is the average speed..

Answer 1

Speed on reaching= 12km/hr
Speed on returning=15km/hr
hence, average speed= {(12+15)/2}km/hr
={27/2}km/hr
=13.5km/hr
Ans). 13.5km/hr is the average speed