Question

A boat moves from A to B at speed 15 km/Hr. and returns back A at speed 10 Km/Hr. Find the average speed of boat in Km/Hr.

Answer 1

Answer:

12km/hr

Step-by-step explanation:

speed of the bpat from A to B=15km/hr and

from B to A=10km/hr

now

speed=total distance/total time

now let distance from A to B=X

and from B to A=X

t1=X/15 hr

t2=X/10 hr

total time= t1+t2=X/15+X/10=10X/60=X/6

now avg.speed=distance/time

avg.speed=X+X/X/6=2X/X/6=12km/hr