Question

A car covers first 100 km of his journey at 50 km/h, next 50 km at 40 km/h and last 75 km in 5/4 hours Find the average speed of the whole journey.

Please answer the question no.5
Paper only please

Answer 1

Answer:

50km/h

Step-by-step explanation:

Average speed =total distance/total time =(100 + 50 + 75)/[(100/50)+(50/40)+5/4]

= (150+75)/[2+2.5]

= (225/4.5)

= 2250/45

= 150/3 = 50 km/h

Answer 2

Answer:

average speed is total distance/total time