Question

A car travels at a speed 40km/hr for 2 hours and then at 60km/hr for 3 hours .What is the average speed of the car during the entire journey?

Answer 1

speed=distance/travel time
distance=2*40+60*3
              =80+180
              =260 km
travel time=2+3=5 hrs
∴ average speed during the whole journey=260/5
                                                                   =52 km/h
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Answer 2

Hey there !

Average speed= Total distance traveled /total time taken

Distance = 40 km [ 1 hr ]
= 40 x 2 = 80 km in 2 hrs
= 60 km [ 1 hr ]
= 60 x 3 = 180 km in 3 hr

Total distance = 180 + 80 = 260 km
Total time = 2+3 = 5 hrs
Average speed = 260/5
= 52 km/hr

Hope this Helps You !!