Question

a car covers first 100 km of his journey at 50 km/hr, next 50km at 40 km/hr and last 75 km in 1 whole 1/4hours. find the average speed of the whole journey​

Answer 1

Answer:

idk

Step-by-step explanation:

Answer 2

Answer:

50 km per hour

Step-by-step explanation:

Speed = Distance / Time

Distance = Speed * Time

Time = Distance / Speed

Part 1:

Distance = 100 km

Speed = 50 km per hour

=> Time = 2 hours

Part 2:

Distance = 50 km

Speed = 40 km per hour

=> Time = 50/40 = 1.25 hours

Part 3:

Distance = 75 km

Time = 1.25 hours

Total Distance covered in 3 phases = 100 + 50 + 75 = 225 km

Total time taken = 2 + 1.25 + 1.25 = 4.5 hours

Average Speed = Total Distance/ Total Time

                           = 225 / 4.5

                           = 50 km per hour

Answer: Average speed of the entire journey = 50 km per hour