Question

A car travels the first 19 km of its journey at an average speed of 57km/h
and the remaining 55 km at an average speed of 110 km/h. Find the
average speedo of the car for its entire journey?

Answer 1

Answer:

so Here is Your Answer with details

Step-by-step explanation:

a car travels the first 19 km of its journey at an average speed of 57 km per hour and the remaining 55 km at an average speed of 110 kilometre per hour find the average speed of the car for its entire journey. Lakshay7310 is waiting for your help.

Answer 2

Answer:

55 km/h

Step-by-step explanation:

At 57km/h, to drive 19km takes 19/57 = 1/3 hour (or 20 minutes).

At 110km/h, to drive 55km takes 55/110 = 1/2 hour (or 30 minutes).

Since it takes 5/6 hour (or 50 minutes) to drive the 19+55 = 74 km,

the average speed is: 74 / (5/6) = 74 * (6/5) = 88.8 km /h.

Alternatively: 74 km / 50 minutes = 1.48 km/minute

= 1.48 km/minute * 60 minutes/ 1 hour = 1.48 * 60 km/h = 88.8 km /h

= 1.48 km/minute * 1 minute / 60 seconds = 24.6666… m/s

~= 55 m/h