0

Guest

Courses New

A car travels up a hill at a constant speed of 37 km/h and returns down the hill at a constant speed of 66 km/h. Calculate the average speed for the whole trip

A car travels up a hill at a constant speed of 37 km/h and returns down the hill at a constant speed of 66 km/h. Calculate the average speed for the whole trip

Grade:11

2 Answers

Arun
25757 Points
4 years ago
 

By definition the average speed is the ration of the total traveled distance and the total traveled time. Let us introduce the total traveled distance of the car as L. Then the time of the travel up the hill is

t1 = L/74

The time of the travel down the hill is

t2 = L/132

The total traveled time is

 t = t1 + t2 = L/74 + L/132 = 0.0211 L

Then the average velocity is

 Vavg = L/t = L/0.0211 L = 47.393 km/hr

 
Vikas TU
14149 Points
4 years ago
Dear student 
Average speed Of thw whle trip will be 
= 2V1V2 / V1+ V2 
=> 2* 37 * 66 /103 
=> 47.47 m/sec 
Hope this clears 
Good Luck 
 

Think You Can Provide A Better Answer ?

Other Related Questions on Wave Optics

View all Questions »

ASK QUESTION

Get your questions answered by the expert for free

Answer and earn gift vouchers

Win Gift vouchers upto Rs 500/-

View courses by askIITians

Design classes One-on-One in your own way with Top IITians/Medical Professionals

Click Here Know More

Complete Self Study Package designed by Industry Leading Experts

Click Here Know More

Live 1-1 coding classes to unleash the Creator in your Child

Click Here Know More

a Complete All-in-One Study package Fully Loaded inside a Tablet!

Click Here Know More