Question

A car travels from Banglore to Mysore on a road that is 150 km. long . If first half of the journey is traveled at 60 km per hour and the remaining journey at 80 km per hour . Find the average speed of the car .

Answer 1

time taken in 1st half=75/60= 5/4 hr
time taken in another half=75/80=15/16hr
total time =5/4+15/16=35/16hr
average speed=total distance/total time
=150/35/16=(150*16)/35=30*16/7=480/7=68.57km/ hr

Answer 2

Answer:

Motion and time hw --> 1. A boys cycle down from this house to this school at a speed of 24 km/ hr and reached school in 20 minutes.How far is the school from his house.

2. A car travels the distance between Bengalaru and Mysore in 3 hours.If the distance between the twoplaces is 120 km.what is the average speed of the car?