Question

A car travels from A to B with an average speed of 40km/h in 2 hours.Then it moves from B to C with an average speed of 40 km/h in 3 hours. Find the average speed of the car although the journey.

Answer 1

Explanation:

AB

Speed=40km/h

time=2hrs

BC

S=40km/h

t=3hrs

Total average speed=total distance÷total time

Total distance=40km/h×2hr

AB=80km

=40km/h×3

BC=120km

Total distance= 120+80= 200km

Total Time= 2+3=5hrs

Total average speed= 200÷5

T.A.S= 40Km/hr

Answer 2

Answer:

$total \: distance \: speed = total \: distance \div total \: time \:$

total average speed=200÷5

T.A.S.=40km/hr

Explanation:

AB

speed = 40km/h

time =2hrs

BC

speed = 40km/h

time= 3hrs

total distance =40km/h×2hr

AB = 80km

= km/h×3

BC= 120 km

total distance=120+80=200 km

total time = 2+5=5 hrs