Question

Ajay walked at an average speed of 8 km/hr for 45 minutes and then ran at an average speed of 12 km/hr for 40 minutes. What was his average speed for the whole journey.​

Answer 1

Answer:

Step-by-step explanation:

Ajay walked at an average speed of 8 km per hour for 45 minutes

Speed =8 km/hr

Time = 45 minutes = $\frac{45}{60}$ hour

Distance = Speed = time 8 ×$\frac{45}{60}$

He walked at an average speed of 12 kilometre per hour for 40 minutes

Speed = 12 km/hr

Time = 40 minutes =  $\frac{40}{60}$

Distance = Speed * time =  12 x $\frac{40}{60}$ = 8

Total distance = 8+6 = 14 km

Total Time = $\frac{45}{60} + \frac{40}{60} = \frac{85}{60}$  

Average speed = Distance/Time =  $\frac{85}{60} = 5.64km/hr$

Hence his average speed for the whole journey is 5.64 km/hr

Hope it helps....

Answer 2

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